/*==================================================
 Copyright (c) 2013-2015 司徒正美 and other contributors
 http://www.cnblogs.com/rubylouvre/
 https://github.com/RubyLouvre
 http://weibo.com/jslouvre/

 Released under the MIT license
 avalon.js 1.46 built in 2015.10.3
 support IE6+ and other browsers
 ==================================================*/
(function(global, factory) {

  if (typeof module === "object" && typeof module.exports === "object") {
    // For CommonJS and CommonJS-like environments where a proper `window`
    // is present, execute the factory and get avalon.
    // For environments that do not have a `window` with a `document`
    // (such as Node.js), expose a factory as module.exports.
    // This accentuates the need for the creation of a real `window`.
    // e.g. var avalon = require("avalon")(window);
    module.exports = global.document ? factory(global, true) : function(w) {
      if (!w.document) {
        throw new Error("Avalon requires a window with a document")
      }
      return factory(w)
    }
  } else {
    factory(global)
  }

// Pass this if window is not defined yet
}(typeof window !== "undefined" ? window : this, function(window, noGlobal){

  /*********************************************************************
   *                    全局变量及方法                                  *
   **********************************************************************/
  var expose = new Date() - 0
//http://stackoverflow.com/questions/7290086/javascript-use-strict-and-nicks-find-global-function
  var DOC = window.document
  var head = DOC.getElementsByTagName("head")[0] //HEAD元素
  var ifGroup = head.insertBefore(document.createElement("avalon"), head.firstChild) //避免IE6 base标签BUG
  ifGroup.innerHTML = "X<style id='avalonStyle'>.avalonHide{ display: none!important }</style>"
  ifGroup.setAttribute("ms-skip", "1")
  ifGroup.className = "avalonHide"
  var rnative = /\[native code\]/ //判定是否原生函数
  function log() {
    if (window.console && avalon.config.debug) {
      // http://stackoverflow.com/questions/8785624/how-to-safely-wrap-console-log
      Function.apply.call(console.log, console, arguments)
    }
  }


  var subscribers = "$" + expose
  var otherRequire = window.require
  var otherDefine = window.define
  var innerRequire
  var stopRepeatAssign = false
  var rword = /[^, ]+/g //切割字符串为一个个小块，以空格或豆号分开它们，结合replace实现字符串的forEach
  var rcomplexType = /^(?:object|array)$/
  var rsvg = /^\[object SVG\w*Element\]$/
  var rwindow = /^\[object (?:Window|DOMWindow|global)\]$/
  var oproto = Object.prototype
  var ohasOwn = oproto.hasOwnProperty
  var serialize = oproto.toString
  var ap = Array.prototype
  var aslice = ap.slice
  var Registry = {} //将函数曝光到此对象上，方便访问器收集依赖
  var W3C = window.dispatchEvent
  var root = DOC.documentElement
  var avalonFragment = DOC.createDocumentFragment()
  var cinerator = DOC.createElement("div")
  var class2type = {}
  "Boolean Number String Function Array Date RegExp Object Error".replace(rword, function (name) {
    class2type["[object " + name + "]"] = name.toLowerCase()
  })


  function noop() {
  }


  function oneObject(array, val) {
    if (typeof array === "string") {
      array = array.match(rword) || []
    }
    var result = {},
        value = val !== void 0 ? val : 1
    for (var i = 0, n = array.length; i < n; i++) {
      result[array[i]] = value
    }
    return result
  }

//生成UUID http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript
  var generateID = function (prefix) {
    prefix = prefix || "avalon"
    return String(Math.random() + Math.random()).replace(/\d\.\d{4}/, prefix)
  }
  function IE() {
    if (window.VBArray) {
      var mode = document.documentMode
      return mode ? mode : window.XMLHttpRequest ? 7 : 6
    } else {
      return NaN
    }
  }
  var IEVersion = IE()

  avalon = function (el) { //创建jQuery式的无new 实例化结构
    return new avalon.init(el)
  }

  avalon.profile = function () {
    if (window.console && avalon.config.profile) {
      Function.apply.call(console.log, console, arguments)
    }
  }

  /*视浏览器情况采用最快的异步回调*/
  avalon.nextTick = new function () {// jshint ignore:line
    var tickImmediate = window.setImmediate
    var tickObserver = window.MutationObserver
    if (tickImmediate) {//IE10 \11 edage
      return tickImmediate.bind(window)
    }

    var queue = []
    function callback() {
      var n = queue.length
      for (var i = 0; i < n; i++) {
        queue[i]()
      }
      queue = queue.slice(n)
    }

    if (tickObserver) {// 支持MutationObserver
      var node = document.createTextNode("avalon")
      new tickObserver(callback).observe(node, {characterData: true})// jshint ignore:line
      return function (fn) {
        queue.push(fn)
        node.data = Math.random()
      }
    }

    if (window.VBArray) {
      return function (fn) {
        queue.push(fn)
        var node = DOC.createElement("script")
        node.onreadystatechange = function () {
          callback() //在interactive阶段就触发
          node.onreadystatechange = null
          head.removeChild(node)
          node = null
        }
        head.appendChild(node)
      }
    }


    return function (fn) {
      setTimeout(fn, 4)
    }
  }// jshint ignore:line
  /*********************************************************************
   *                 avalon的静态方法定义区                              *
   **********************************************************************/
  avalon.init = function (el) {
    this[0] = this.element = el
  }
  avalon.fn = avalon.prototype = avalon.init.prototype

  avalon.type = function (obj) { //取得目标的类型
    if (obj == null) {
      return String(obj)
    }
    // 早期的webkit内核浏览器实现了已废弃的ecma262v4标准，可以将正则字面量当作函数使用，因此typeof在判定正则时会返回function
    return typeof obj === "object" || typeof obj === "function" ?
    class2type[serialize.call(obj)] || "object" :
        typeof obj
  }

  var isFunction = typeof alert === "object" ? function (fn) {
    try {
      return /^\s*\bfunction\b/.test(fn + "")
    } catch (e) {
      return false
    }
  } : function (fn) {
    return serialize.call(fn) === "[object Function]"
  }
  avalon.isFunction = isFunction

  avalon.isWindow = function (obj) {
    if (!obj)
      return false
    // 利用IE678 window == document为true,document == window竟然为false的神奇特性
    // 标准浏览器及IE9，IE10等使用 正则检测
    return obj == obj.document && obj.document != obj //jshint ignore:line
  }

  function isWindow(obj) {
    return rwindow.test(serialize.call(obj))
  }
  if (isWindow(window)) {
    avalon.isWindow = isWindow
  }
  var enu
  for (enu in avalon({})) {
    break
  }
  var enumerateBUG = enu !== "0" //IE6下为true, 其他为false
  /*判定是否是一个朴素的javascript对象（Object），不是DOM对象，不是BOM对象，不是自定义类的实例*/
  avalon.isPlainObject = function (obj, key) {
    if (!obj || avalon.type(obj) !== "object" || obj.nodeType || avalon.isWindow(obj)) {
      return false;
    }
    try { //IE内置对象没有constructor
      if (obj.constructor && !ohasOwn.call(obj, "constructor") && !ohasOwn.call(obj.constructor.prototype, "isPrototypeOf")) {
        return false;
      }
    } catch (e) { //IE8 9会在这里抛错
      return false;
    }
    if (enumerateBUG) {
      for (key in obj) {
        return ohasOwn.call(obj, key)
      }
    }
    for (key in obj) {
    }
    return key === void 0 || ohasOwn.call(obj, key)
  }
  if (rnative.test(Object.getPrototypeOf)) {
    avalon.isPlainObject = function (obj) {
      // 简单的 typeof obj === "object"检测，会致使用isPlainObject(window)在opera下通不过
      return serialize.call(obj) === "[object Object]" && Object.getPrototypeOf(obj) === oproto
    }
  }
//与jQuery.extend方法，可用于浅拷贝，深拷贝
  avalon.mix = avalon.fn.mix = function () {
    var options, name, src, copy, copyIsArray, clone,
        target = arguments[0] || {},
        i = 1,
        length = arguments.length,
        deep = false

    // 如果第一个参数为布尔,判定是否深拷贝
    if (typeof target === "boolean") {
      deep = target
      target = arguments[1] || {}
      i++
    }

    //确保接受方为一个复杂的数据类型
    if (typeof target !== "object" && !isFunction(target)) {
      target = {}
    }

    //如果只有一个参数，那么新成员添加于mix所在的对象上
    if (i === length) {
      target = this
      i--
    }

    for (; i < length; i++) {
      //只处理非空参数
      if ((options = arguments[i]) != null) {
        for (name in options) {
          src = target[name]
          try {
            copy = options[name] //当options为VBS对象时报错
          } catch (e) {
            continue
          }

          // 防止环引用
          if (target === copy) {
            continue
          }
          if (deep && copy && (avalon.isPlainObject(copy) || (copyIsArray = Array.isArray(copy)))) {

            if (copyIsArray) {
              copyIsArray = false
              clone = src && Array.isArray(src) ? src : []

            } else {
              clone = src && avalon.isPlainObject(src) ? src : {}
            }

            target[name] = avalon.mix(deep, clone, copy)
          } else if (copy !== void 0) {
            target[name] = copy
          }
        }
      }
    }
    return target
  }

  function _number(a, len) { //用于模拟slice, splice的效果
    a = Math.floor(a) || 0
    return a < 0 ? Math.max(len + a, 0) : Math.min(a, len);
  }

  avalon.mix({
    rword: rword,
    subscribers: subscribers,
    version: 1.46,
    ui: {},
    log: log,
    slice: W3C ? function (nodes, start, end) {
      return aslice.call(nodes, start, end)
    } : function (nodes, start, end) {
      var ret = []
      var len = nodes.length
      if (end === void 0)
        end = len
      if (typeof end === "number" && isFinite(end)) {
        start = _number(start, len)
        end = _number(end, len)
        for (var i = start; i < end; ++i) {
          ret[i - start] = nodes[i]
        }
      }
      return ret
    },
    noop: noop,
    /*如果不用Error对象封装一下，str在控制台下可能会乱码*/
    error: function (str, e) {
      throw  (e || Error)(str)
    },
    /*将一个以空格或逗号隔开的字符串或数组,转换成一个键值都为1的对象*/
    oneObject: oneObject,
    /* avalon.range(10)
     => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
     avalon.range(1, 11)
     => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
     avalon.range(0, 30, 5)
     => [0, 5, 10, 15, 20, 25]
     avalon.range(0, -10, -1)
     => [0, -1, -2, -3, -4, -5, -6, -7, -8, -9]
     avalon.range(0)
     => []*/
    range: function (start, end, step) { // 用于生成整数数组
      step || (step = 1)
      if (end == null) {
        end = start || 0
        start = 0
      }
      var index = -1,
          length = Math.max(0, Math.ceil((end - start) / step)),
          result = new Array(length)
      while (++index < length) {
        result[index] = start
        start += step
      }
      return result
    },
    eventHooks: [],
    /*绑定事件*/
    bind: function (el, type, fn, phase) {
      var hooks = avalon.eventHooks
      var hook = hooks[type]
      if (typeof hook === "object") {
        type = hook.type || type
        phase = hook.phase || !!phase
        fn = hook.fn ? hook.fn(el,fn): fn
      }
      var callback = W3C ? fn : function (e) {
        fn.call(el, fixEvent(e));
      }
      if (W3C) {
        el.addEventListener(type, callback, phase)
      } else {
        el.attachEvent("on" + type, callback)
      }
      return callback
    },
    /*卸载事件*/
    unbind: function (el, type, fn, phase) {
      var hooks = avalon.eventHooks
      var hook = hooks[type]
      var callback = fn || noop
      if (typeof hook === "object") {
        type = hook.type || type
        phase = hook.phase || !!phase
      }
      if (W3C) {
        el.removeEventListener(type, callback, phase)
      } else {
        el.detachEvent("on" + type, callback)
      }
    },
    /*读写删除元素节点的样式*/
    css: function (node, name, value) {
      if (node instanceof avalon) {
        node = node[0]
      }
      var prop = /[_-]/.test(name) ? camelize(name) : name, fn
      name = avalon.cssName(prop) || prop
      if (value === void 0 || typeof value === "boolean") { //获取样式
        fn = cssHooks[prop + ":get"] || cssHooks["@:get"]
        if (name === "background") {
          name = "backgroundColor"
        }
        var val = fn(node, name)
        return value === true ? parseFloat(val) || 0 : val
      } else if (value === "") { //请除样式
        node.style[name] = ""
      } else { //设置样式
        if (value == null || value !== value) {
          return
        }
        if (isFinite(value) && !avalon.cssNumber[prop]) {
          value += "px"
        }
        fn = cssHooks[prop + ":set"] || cssHooks["@:set"]
        fn(node, name, value)
      }
    },
    /*遍历数组与对象,回调的第一个参数为索引或键名,第二个或元素或键值*/
    each: function (obj, fn) {
      if (obj) { //排除null, undefined
        var i = 0
        if (isArrayLike(obj)) {
          for (var n = obj.length; i < n; i++) {
            if (fn(i, obj[i]) === false)
              break
          }
        } else {
          for (i in obj) {
            if (obj.hasOwnProperty(i) && fn(i, obj[i]) === false) {
              break
            }
          }
        }
      }
    },
    //收集元素的data-{{prefix}}-*属性，并转换为对象
    getWidgetData: function (elem, prefix) {
      var raw = avalon(elem).data()
      var result = {}
      for (var i in raw) {
        if (i.indexOf(prefix) === 0) {
          result[i.replace(prefix, "").replace(/\w/, function (a) {
            return a.toLowerCase()
          })] = raw[i]
        }
      }
      return result
    },
    Array: {
      /*只有当前数组不存在此元素时只添加它*/
      ensure: function (target, item) {
        if (target.indexOf(item) === -1) {
          return target.push(item)
        }
      },
      /*移除数组中指定位置的元素，返回布尔表示成功与否*/
      removeAt: function (target, index) {
        return !!target.splice(index, 1).length
      },
      /*移除数组中第一个匹配传参的那个元素，返回布尔表示成功与否*/
      remove: function (target, item) {
        var index = target.indexOf(item)
        if (~index)
          return avalon.Array.removeAt(target, index)
        return false
      }
    }
  })

  var bindingHandlers = avalon.bindingHandlers = {}
  var bindingExecutors = avalon.bindingExecutors = {}

  /*判定是否类数组，如节点集合，纯数组，arguments与拥有非负整数的length属性的纯JS对象*/
  function isArrayLike(obj) {
    if (!obj)
      return false
    var n = obj.length
    if (n === (n >>> 0)) { //检测length属性是否为非负整数
      var type = serialize.call(obj).slice(8, -1)
      if (/(?:regexp|string|function|window|global)$/i.test(type))
        return false
      if (type === "Array")
        return true
      try {
        if ({}.propertyIsEnumerable.call(obj, "length") === false) { //如果是原生对象
          return  /^\s?function/.test(obj.item || obj.callee)
        }
        return true
      } catch (e) { //IE的NodeList直接抛错
        return !obj.window //IE6-8 window
      }
    }
    return false
  }


// https://github.com/rsms/js-lru
  var Cache = new function() {// jshint ignore:line
    function LRU(maxLength) {
      this.size = 0
      this.limit = maxLength
      this.head = this.tail = void 0
      this._keymap = {}
    }

    var p = LRU.prototype

    p.put = function(key, value) {
      var entry = {
        key: key,
        value: value
      }
      this._keymap[key] = entry
      if (this.tail) {
        this.tail.newer = entry
        entry.older = this.tail
      } else {
        this.head = entry
      }
      this.tail = entry
      if (this.size === this.limit) {
        this.shift()
      } else {
        this.size++
      }
      return value
    }

    p.shift = function() {
      var entry = this.head
      if (entry) {
        this.head = this.head.newer
        this.head.older =
            entry.newer =
                entry.older =
                    this._keymap[entry.key] = void 0
        delete this._keymap[entry.key] //#1029
      }
    }
    p.get = function(key) {
      var entry = this._keymap[key]
      if (entry === void 0)
        return
      if (entry === this.tail) {
        return  entry.value
      }
      // HEAD--------------TAIL
      //   <.older   .newer>
      //  <--- add direction --
      //   A  B  C  <D>  E
      if (entry.newer) {
        if (entry === this.head) {
          this.head = entry.newer
        }
        entry.newer.older = entry.older // C <-- E.
      }
      if (entry.older) {
        entry.older.newer = entry.newer // C. --> E
      }
      entry.newer = void 0 // D --x
      entry.older = this.tail // D. --> E
      if (this.tail) {
        this.tail.newer = entry // E. <-- D
      }
      this.tail = entry
      return entry.value
    }
    return LRU
  }// jshint ignore:line

  /*********************************************************************
   *                         javascript 底层补丁                       *
   **********************************************************************/
  if (!"司徒正美".trim) {
    var rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g
    String.prototype.trim = function () {
      return this.replace(rtrim, "")
    }
  }
  var hasDontEnumBug = !({
        'toString': null
      }).propertyIsEnumerable('toString'),
      hasProtoEnumBug = (function () {
      }).propertyIsEnumerable('prototype'),
      dontEnums = [
        "toString",
        "toLocaleString",
        "valueOf",
        "hasOwnProperty",
        "isPrototypeOf",
        "propertyIsEnumerable",
        "constructor"
      ],
      dontEnumsLength = dontEnums.length;
  if (!Object.keys) {
    Object.keys = function (object) { //ecma262v5 15.2.3.14
      var theKeys = []
      var skipProto = hasProtoEnumBug && typeof object === "function"
      if (typeof object === "string" || (object && object.callee)) {
        for (var i = 0; i < object.length; ++i) {
          theKeys.push(String(i))
        }
      } else {
        for (var name in object) {
          if (!(skipProto && name === "prototype") && ohasOwn.call(object, name)) {
            theKeys.push(String(name))
          }
        }
      }

      if (hasDontEnumBug) {
        var ctor = object.constructor,
            skipConstructor = ctor && ctor.prototype === object
        for (var j = 0; j < dontEnumsLength; j++) {
          var dontEnum = dontEnums[j]
          if (!(skipConstructor && dontEnum === "constructor") && ohasOwn.call(object, dontEnum)) {
            theKeys.push(dontEnum)
          }
        }
      }
      return theKeys
    }
  }
  if (!Array.isArray) {
    Array.isArray = function (a) {
      return serialize.call(a) === "[object Array]"
    }
  }

  if (!noop.bind) {
    Function.prototype.bind = function (scope) {
      if (arguments.length < 2 && scope === void 0)
        return this
      var fn = this,
          argv = arguments
      return function () {
        var args = [],
            i
        for (i = 1; i < argv.length; i++)
          args.push(argv[i])
        for (i = 0; i < arguments.length; i++)
          args.push(arguments[i])
        return fn.apply(scope, args)
      }
    }
  }

  function iterator(vars, body, ret) {
    var fun = 'for(var ' + vars + 'i=0,n = this.length; i < n; i++){' + body.replace('_', '((i in this) && fn.call(scope,this[i],i,this))') + '}' + ret
    /* jshint ignore:start */
    return Function("fn,scope", fun)
    /* jshint ignore:end */
  }
  if (!rnative.test([].map)) {
    avalon.mix(ap, {
      //定位操作，返回数组中第一个等于给定参数的元素的索引值。
      indexOf: function (item, index) {
        var n = this.length,
            i = ~~index
        if (i < 0)
          i += n
        for (; i < n; i++)
          if (this[i] === item)
            return i
        return -1
      },
      //定位操作，同上，不过是从后遍历。
      lastIndexOf: function (item, index) {
        var n = this.length,
            i = index == null ? n - 1 : index
        if (i < 0)
          i = Math.max(0, n + i)
        for (; i >= 0; i--)
          if (this[i] === item)
            return i
        return -1
      },
      //迭代操作，将数组的元素挨个儿传入一个函数中执行。Prototype.js的对应名字为each。
      forEach: iterator("", '_', ""),
      //迭代类 在数组中的每个项上运行一个函数，如果此函数的值为真，则此元素作为新数组的元素收集起来，并返回新数组
      filter: iterator('r=[],j=0,', 'if(_)r[j++]=this[i]', 'return r'),
      //收集操作，将数组的元素挨个儿传入一个函数中执行，然后把它们的返回值组成一个新数组返回。Prototype.js的对应名字为collect。
      map: iterator('r=[],', 'r[i]=_', 'return r'),
      //只要数组中有一个元素满足条件（放进给定函数返回true），那么它就返回true。Prototype.js的对应名字为any。
      some: iterator("", 'if(_)return true', 'return false'),
      //只有数组中的元素都满足条件（放进给定函数返回true），它才返回true。Prototype.js的对应名字为all。
      every: iterator("", 'if(!_)return false', 'return true')
    })
  }
  /*********************************************************************
   *                           DOM 底层补丁                             *
   **********************************************************************/

  function fixContains(root, el) {
    try { //IE6-8,游离于DOM树外的文本节点，访问parentNode有时会抛错
      while ((el = el.parentNode))
        if (el === root)
          return true
      return false
    } catch (e) {
      return false
    }
  }
  avalon.contains = fixContains
//IE6-11的文档对象没有contains
  if (!DOC.contains) {
    DOC.contains = function (b) {
      return fixContains(DOC, b)
    }
  }

  function outerHTML() {
    return new XMLSerializer().serializeToString(this)
  }

  if (window.SVGElement) {
    //safari5+是把contains方法放在Element.prototype上而不是Node.prototype
    if (!DOC.createTextNode("x").contains) {
      Node.prototype.contains = function (arg) {//IE6-8没有Node对象
        return !!(this.compareDocumentPosition(arg) & 16)
      }
    }
    var svgns = "http://www.w3.org/2000/svg"
    var svg = DOC.createElementNS(svgns, "svg")
    svg.innerHTML = '<circle cx="50" cy="50" r="40" fill="red" />'
    if (!rsvg.test(svg.firstChild)) { // #409
      function enumerateNode(node, targetNode) {// jshint ignore:line
        if (node && node.childNodes) {
          var nodes = node.childNodes
          for (var i = 0, el; el = nodes[i++]; ) {
            if (el.tagName) {
              var svg = DOC.createElementNS(svgns,
                  el.tagName.toLowerCase())
              ap.forEach.call(el.attributes, function (attr) {
                svg.setAttribute(attr.name, attr.value) //复制属性
              })// jshint ignore:line
              // 递归处理子节点
              enumerateNode(el, svg)
              targetNode.appendChild(svg)
            }
          }
        }
      }
      Object.defineProperties(SVGElement.prototype, {
        "outerHTML": {//IE9-11,firefox不支持SVG元素的innerHTML,outerHTML属性
          enumerable: true,
          configurable: true,
          get: outerHTML,
          set: function (html) {
            var tagName = this.tagName.toLowerCase(),
                par = this.parentNode,
                frag = avalon.parseHTML(html)
            // 操作的svg，直接插入
            if (tagName === "svg") {
              par.insertBefore(frag, this)
              // svg节点的子节点类似
            } else {
              var newFrag = DOC.createDocumentFragment()
              enumerateNode(frag, newFrag)
              par.insertBefore(newFrag, this)
            }
            par.removeChild(this)
          }
        },
        "innerHTML": {
          enumerable: true,
          configurable: true,
          get: function () {
            var s = this.outerHTML
            var ropen = new RegExp("<" + this.nodeName + '\\b(?:(["\'])[^"]*?(\\1)|[^>])*>', "i")
            var rclose = new RegExp("<\/" + this.nodeName + ">$", "i")
            return s.replace(ropen, "").replace(rclose, "")
          },
          set: function (html) {
            if (avalon.clearHTML) {
              avalon.clearHTML(this)
              var frag = avalon.parseHTML(html)
              enumerateNode(frag, this)
            }
          }
        }
      })
    }
  }
  if (!root.outerHTML && window.HTMLElement) { //firefox 到11时才有outerHTML
    HTMLElement.prototype.__defineGetter__("outerHTML", outerHTML);
  }


//============================= event binding =======================
  var rmouseEvent = /^(?:mouse|contextmenu|drag)|click/
  function fixEvent(event) {
    var ret = {}
    for (var i in event) {
      ret[i] = event[i]
    }
    var target = ret.target = event.srcElement
    if (event.type.indexOf("key") === 0) {
      ret.which = event.charCode != null ? event.charCode : event.keyCode
    } else if (rmouseEvent.test(event.type)) {
      var doc = target.ownerDocument || DOC
      var box = doc.compatMode === "BackCompat" ? doc.body : doc.documentElement
      ret.pageX = event.clientX + (box.scrollLeft >> 0) - (box.clientLeft >> 0)
      ret.pageY = event.clientY + (box.scrollTop >> 0) - (box.clientTop >> 0)
      ret.wheelDeltaY = ret.wheelDelta
      ret.wheelDeltaX = 0
    }
    ret.timeStamp = new Date() - 0
    ret.originalEvent = event
    ret.preventDefault = function () { //阻止默认行为
      event.returnValue = false
    }
    ret.stopPropagation = function () { //阻止事件在DOM树中的传播
      event.cancelBubble = true
    }
    return ret
  }

  var eventHooks = avalon.eventHooks
//针对firefox, chrome修正mouseenter, mouseleave
  if (!("onmouseenter" in root)) {
    avalon.each({
      mouseenter: "mouseover",
      mouseleave: "mouseout"
    }, function (origType, fixType) {
      eventHooks[origType] = {
        type: fixType,
        fn: function (elem, fn) {
          return function (e) {
            var t = e.relatedTarget
            if (!t || (t !== elem && !(elem.compareDocumentPosition(t) & 16))) {
              delete e.type
              e.type = origType
              return fn.call(elem, e)
            }
          }
        }
      }
    })
  }
//针对IE9+, w3c修正animationend
  avalon.each({
    AnimationEvent: "animationend",
    WebKitAnimationEvent: "webkitAnimationEnd"
  }, function (construct, fixType) {
    if (window[construct] && !eventHooks.animationend) {
      eventHooks.animationend = {
        type: fixType
      }
    }
  })
//针对IE6-8修正input
  if (!("oninput" in DOC.createElement("input"))) {
    eventHooks.input = {
      type: "propertychange",
      fn: function (elem, fn) {
        return function (e) {
          if (e.propertyName === "value") {
            e.type = "input"
            return fn.call(elem, e)
          }
        }
      }
    }
  }
  if (DOC.onmousewheel === void 0) {
    /* IE6-11 chrome mousewheel wheelDetla 下 -120 上 120
     firefox DOMMouseScroll detail 下3 上-3
     firefox wheel detlaY 下3 上-3
     IE9-11 wheel deltaY 下40 上-40
     chrome wheel deltaY 下100 上-100 */
    var fixWheelType = DOC.onwheel !== void 0 ? "wheel" : "DOMMouseScroll"
    var fixWheelDelta = fixWheelType === "wheel" ? "deltaY" : "detail"
    eventHooks.mousewheel = {
      type: fixWheelType,
      fn: function (elem, fn) {
        return function (e) {
          e.wheelDeltaY = e.wheelDelta = e[fixWheelDelta] > 0 ? -120 : 120
          e.wheelDeltaX = 0
          if (Object.defineProperty) {
            Object.defineProperty(e, "type", {
              value: "mousewheel"
            })
          }
          fn.call(elem, e)
        }
      }
    }
  }



  /*********************************************************************
   *                           配置系统                                 *
   **********************************************************************/

  function kernel(settings) {
    for (var p in settings) {
      if (!ohasOwn.call(settings, p))
        continue
      var val = settings[p]
      if (typeof kernel.plugins[p] === "function") {
        kernel.plugins[p](val)
      } else if (typeof kernel[p] === "object") {
        avalon.mix(kernel[p], val)
      } else {
        kernel[p] = val
      }
    }
    return this
  }
  var openTag, closeTag, rexpr, rexprg, rbind, rregexp = /[-.*+?^${}()|[\]\/\\]/g

  function escapeRegExp(target) {
    //http://stevenlevithan.com/regex/xregexp/
    //将字符串安全格式化为正则表达式的源码
    return (target + "").replace(rregexp, "\\$&")
  }

  var plugins = {
    loader: function (builtin) {
      var flag = innerRequire && builtin
      window.require = flag ? innerRequire : otherRequire
      window.define = flag ? innerRequire.define : otherDefine
    },
    interpolate: function (array) {
      openTag = array[0]
      closeTag = array[1]
      if (openTag === closeTag) {
        throw new SyntaxError("openTag===closeTag")
      } else {
        var test = openTag + "test" + closeTag
        cinerator.innerHTML = test
        if (cinerator.innerHTML !== test && cinerator.innerHTML.indexOf("&lt;") > -1) {
          throw new SyntaxError("此定界符不合法")
        }
        kernel.openTag = openTag
        kernel.closeTag = closeTag
        cinerator.innerHTML = ""
      }
      var o = escapeRegExp(openTag),
          c = escapeRegExp(closeTag)
      rexpr = new RegExp(o + "(.*?)" + c)
      rexprg = new RegExp(o + "(.*?)" + c, "g")
      rbind = new RegExp(o + ".*?" + c + "|\\sms-")
    }
  }

  kernel.debug = true
  kernel.plugins = plugins
  kernel.plugins['interpolate'](["{{", "}}"])
  kernel.paths = {}
  kernel.shim = {}
  kernel.maxRepeatSize = 100
  avalon.config = kernel
  var ravalon = /(\w+)\[(avalonctrl)="(\S+)"\]/
  var findNodes = DOC.querySelectorAll ? function(str) {
    return DOC.querySelectorAll(str)
  } : function(str) {
    var match = str.match(ravalon)
    var all = DOC.getElementsByTagName(match[1])
    var nodes = []
    for (var i = 0, el; el = all[i++]; ) {
      if (el.getAttribute(match[2]) === match[3]) {
        nodes.push(el)
      }
    }
    return nodes
  }
  /*********************************************************************
   *                            事件总线                               *
   **********************************************************************/
  var EventBus = {
    $watch: function (type, callback) {
      if (typeof callback === "function") {
        var callbacks = this.$events[type]
        if (callbacks) {
          callbacks.push(callback)
        } else {
          this.$events[type] = [callback]
        }
      } else { //重新开始监听此VM的第一重简单属性的变动
        this.$events = this.$watch.backup
      }
      return this
    },
    $unwatch: function (type, callback) {
      var n = arguments.length
      if (n === 0) { //让此VM的所有$watch回调无效化
        this.$watch.backup = this.$events
        this.$events = {}
      } else if (n === 1) {
        this.$events[type] = []
      } else {
        var callbacks = this.$events[type] || []
        var i = callbacks.length
        while (~--i < 0) {
          if (callbacks[i] === callback) {
            return callbacks.splice(i, 1)
          }
        }
      }
      return this
    },
    $fire: function (type) {
      var special, i, v, callback
      if (/^(\w+)!(\S+)$/.test(type)) {
        special = RegExp.$1
        type = RegExp.$2
      }
      var events = this.$events
      if (!events)
        return
      var args = aslice.call(arguments, 1)
      var detail = [type].concat(args)
      if (special === "all") {
        for (i in avalon.vmodels) {
          v = avalon.vmodels[i]
          if (v !== this) {
            v.$fire.apply(v, detail)
          }
        }
      } else if (special === "up" || special === "down") {
        var elements = events.expr ? findNodes(events.expr) : []
        if (elements.length === 0)
          return
        for (i in avalon.vmodels) {
          v = avalon.vmodels[i]
          if (v !== this) {
            if (v.$events.expr) {
              var eventNodes = findNodes(v.$events.expr)
              if (eventNodes.length === 0) {
                continue
              }
              //循环两个vmodel中的节点，查找匹配（向上匹配或者向下匹配）的节点并设置标识
              /* jshint ignore:start */
              ap.forEach.call(eventNodes, function (node) {
                ap.forEach.call(elements, function (element) {
                  var ok = special === "down" ? element.contains(node) : //向下捕获
                      node.contains(element) //向上冒泡
                  if (ok) {
                    node._avalon = v //符合条件的加一个标识
                  }
                });
              })
              /* jshint ignore:end */
            }
          }
        }
        var nodes = DOC.getElementsByTagName("*") //实现节点排序
        var alls = []
        ap.forEach.call(nodes, function (el) {
          if (el._avalon) {
            alls.push(el._avalon)
            el._avalon = ""
            el.removeAttribute("_avalon")
          }
        })
        if (special === "up") {
          alls.reverse()
        }
        for (i = 0; callback = alls[i++]; ) {
          if (callback.$fire.apply(callback, detail) === false) {
            break
          }
        }
      } else {
        var callbacks = events[type] || []
        var all = events.$all || []
        for (i = 0; callback = callbacks[i++]; ) {
          if (isFunction(callback))
            callback.apply(this, args)
        }
        for (i = 0; callback = all[i++]; ) {
          if (isFunction(callback))
            callback.apply(this, arguments)
        }
      }
    }
  }
  /*********************************************************************
   *                           modelFactory                             *
   **********************************************************************/
//avalon最核心的方法的两个方法之一（另一个是avalon.scan），返回一个ViewModel(VM)
  var VMODELS = avalon.vmodels = {} //所有vmodel都储存在这里
  avalon.define = function (id, factory) {
    var $id = id.$id || id
    if (!$id) {
      log("warning: vm必须指定$id")
    }
    if (VMODELS[$id]) {
      log("warning: " + $id + " 已经存在于avalon.vmodels中")
    }
    if (typeof id === "object") {
      var model = modelFactory(id)
    } else {
      var scope = {
        $watch: noop
      }
      factory(scope) //得到所有定义

      model = modelFactory(scope) //偷天换日，将scope换为model
      stopRepeatAssign = true
      factory(model)
      stopRepeatAssign = false
    }
    model.$id = $id
    return VMODELS[$id] = model
  }

//一些不需要被监听的属性
  var $$skipArray = String("$id,$watch,$unwatch,$fire,$events,$model,$skipArray,$reinitialize").match(rword)
  var defineProperty = Object.defineProperty
  var canHideOwn = true
//如果浏览器不支持ecma262v5的Object.defineProperties或者存在BUG，比如IE8
//标准浏览器使用__defineGetter__, __defineSetter__实现
  try {
    defineProperty({}, "_", {
      value: "x"
    })
    var defineProperties = Object.defineProperties
  } catch (e) {
    canHideOwn = false
  }

  function modelFactory(source, $special, $model) {
    if (Array.isArray(source)) {
      var arr = source.concat()
      source.length = 0
      var collection = arrayFactory(source)
      collection.pushArray(arr)
      return collection
    }
    //0 null undefined || Node || VModel(fix IE6-8 createWithProxy $val: val引发的BUG)
    if (!source || source.nodeType > 0 || (source.$id && source.$events)) {
      return source
    }
    var $skipArray = Array.isArray(source.$skipArray) ? source.$skipArray : []
    $skipArray.$special = $special || {} //强制要监听的属性
    var $vmodel = {} //要返回的对象, 它在IE6-8下可能被偷龙转凤
    $model = $model || {} //vmodels.$model属性
    var $events = {} //vmodel.$events属性
    var accessors = {} //监控属性
    var computed = []
    $$skipArray.forEach(function (name) {
      delete source[name]
    })
    var names = Object.keys(source)
    /* jshint ignore:start */
    names.forEach(function (name, accessor) {
      var val = source[name]
      $model[name] = val
      if (isObservable(name, val, $skipArray)) {
        //总共产生三种accessor
        $events[name] = []
        var valueType = avalon.type(val)
        //总共产生三种accessor
        if (valueType === "object" && isFunction(val.get) && Object.keys(val).length <= 2) {
          accessor = makeComputedAccessor(name, val)
          computed.push(accessor)
        } else if (rcomplexType.test(valueType)) {
          // issue #940 解决$model层次依赖丢失 https://github.com/RubyLouvre/avalon/issues/940
          //  $model[name] = {}
          accessor = makeComplexAccessor(name, val, valueType, $events[name], $model)
        } else {
          accessor = makeSimpleAccessor(name, val)
        }
        accessors[name] = accessor
      }
    })
    /* jshint ignore:end */
    $vmodel = defineProperties($vmodel, descriptorFactory(accessors), source) //生成一个空的ViewModel
    for (var i = 0; i < names.length; i++) {
      var name = names[i]
      if (!accessors[name]) {
        $vmodel[name] = source[name]
      }
    }
    //添加$id, $model, $events, $watch, $unwatch, $fire
    hideProperty($vmodel, "$id", generateID())
    hideProperty($vmodel, "$model", $model)
    hideProperty($vmodel, "$events", $events)
    /* jshint ignore:start */
    if (canHideOwn) {
      hideProperty($vmodel, "hasOwnProperty", function (name) {
        return name in $vmodel.$model
      })
    } else {
      $vmodel.hasOwnProperty = function (name) {
        return (name in $vmodel.$model) && (name !== "hasOwnProperty")
      }
    }
    /* jshint ignore:end */
    for ( i in EventBus) {
      hideProperty($vmodel, i, EventBus[i].bind($vmodel))
    }

    $vmodel.$reinitialize = function () {
      computed.forEach(function (accessor) {
        delete accessor._value
        delete accessor.oldArgs
        accessor.digest = function () {
          accessor.call($vmodel)
        }
        dependencyDetection.begin({
          callback: function (vm, dependency) {//dependency为一个accessor
            var name = dependency._name
            if (dependency !== accessor) {
              var list = vm.$events[name]
              injectDependency(list, accessor.digest)
            }
          }
        })
        try {
          accessor.get.call($vmodel)
        } finally {
          dependencyDetection.end()
        }
      })
    }
    $vmodel.$reinitialize()
    return $vmodel
  }


  function hideProperty(host, name, value) {
    if (canHideOwn) {
      Object.defineProperty(host, name, {
        value: value,
        writable: true,
        enumerable: false,
        configurable: true
      })
    } else {
      host[name] = value
    }
  }
//创建一个简单访问器
  function makeSimpleAccessor(name, value) {
    function accessor(value) {
      var oldValue = accessor._value
      if (arguments.length > 0) {
        if (!stopRepeatAssign && !isEqual(value, oldValue)) {
          accessor.updateValue(this, value)
          accessor.notify(this, value, oldValue)
        }
        return this
      } else {
        dependencyDetection.collectDependency(this, accessor)
        return oldValue
      }
    }
    accessorFactory(accessor, name)
    accessor._value = value
    return accessor;
  }

//创建一个计算访问器
  function makeComputedAccessor(name, options) {
    function accessor(value) {//计算属性
      var oldValue = accessor._value
      var init = ("_value" in accessor)
      if (arguments.length > 0) {
        if (stopRepeatAssign) {
          return this
        }
        if (typeof accessor.set === "function") {
          if (accessor.oldArgs !== value) {
            accessor.oldArgs = value
            var $events = this.$events
            var lock = $events[name]
            $events[name] = [] //清空回调，防止内部冒泡而触发多次$fire
            accessor.set.call(this, value)
            $events[name] = lock
            value = accessor.get.call(this)
            if (value !== oldValue) {
              accessor.updateValue(this, value)
              accessor.notify(this, value, oldValue) //触发$watch回调
            }
          }
        }
        return this
      } else {
        //将依赖于自己的高层访问器或视图刷新函数（以绑定对象形式）放到自己的订阅数组中
        //将自己注入到低层访问器的订阅数组中
        value = accessor.get.call(this)
        accessor.updateValue(this, value)
        if (init && oldValue !== value) {
          accessor.notify(this, value, oldValue) //触发$watch回调
        }
        return value
      }
    }
    accessor.set = options.set
    accessor.get = options.get
    accessorFactory(accessor, name)
    return accessor
  }

//创建一个复杂访问器
  function makeComplexAccessor(name, initValue, valueType, list, parentModel) {

    function accessor(value) {
      var oldValue = accessor._value

      var son = accessor._vmodel
      if (arguments.length > 0) {
        if (stopRepeatAssign) {
          return this
        }
        if (valueType === "array") {
          var a = son, b = value,
              an = a.length,
              bn = b.length
          a.$lock = true
          if (an > bn) {
            a.splice(bn, an - bn)
          } else if (bn > an) {
            a.push.apply(a, b.slice(an))
          }
          var n = Math.min(an, bn)
          for (var i = 0; i < n; i++) {
            a.set(i, b[i])
          }
          delete a.$lock
          a._fire("set")
        } else if (valueType === "object") {
          var observes = this.$events[name] || []
          var newObject = avalon.mix(true, {}, value)
          for(i in son ){
            if(son.hasOwnProperty(i) && ohasOwn.call(newObject,i)){
              son[i] = newObject[i]
            }
          }
          son = accessor._vmodel = modelFactory(value)
          son.$events[subscribers] = observes
          if (observes.length) {
            observes.forEach(function (data) {
              if (!data.type) {
                return //数据未准备好时忽略更新
              }
              if (data.rollback) {
                data.rollback() //还原 ms-with ms-on
              }
              bindingHandlers[data.type](data, data.vmodels)
            })
          }
        }
        accessor.updateValue(this, son.$model)
        accessor.notify(this, this._value, oldValue)
        return this
      } else {
        dependencyDetection.collectDependency(this, accessor)
        return son
      }
    }
    accessorFactory(accessor, name)
    if (Array.isArray(initValue)) {
      parentModel[name] = initValue
    } else {
      parentModel[name] = parentModel[name] || {}
    }
    var son = accessor._vmodel = modelFactory(initValue, 0, parentModel[name])
    son.$events[subscribers] = list
    return accessor
  }

  function globalUpdateValue(vmodel, value) {
    vmodel.$model[this._name] = this._value = value
  }

  function globalNotify(vmodel, value, oldValue) {
    var name = this._name
    var array = vmodel.$events[name] //刷新值
    if (array) {
      fireDependencies(array) //同步视图
      EventBus.$fire.call(vmodel, name, value, oldValue) //触发$watch回调
    }
  }

  function accessorFactory(accessor, name) {
    accessor._name = name
    //同时更新_value与model
    accessor.updateValue = globalUpdateValue
    accessor.notify = globalNotify
  }

//比较两个值是否相等
  var isEqual = Object.is || function (v1, v2) {
        if (v1 === 0 && v2 === 0) {
          return 1 / v1 === 1 / v2
        } else if (v1 !== v1) {
          return v2 !== v2
        } else {
          return v1 === v2
        }
      }

  function isObservable(name, value, $skipArray) {
    if (isFunction(value) || value && value.nodeType) {
      return false
    }
    if ($skipArray.indexOf(name) !== -1) {
      return false
    }
    var $special = $skipArray.$special
    if (name && name.charAt(0) === "$" && !$special[name]) {
      return false
    }
    return true
  }
  function keysVM(obj) {
    var arr = Object.keys(obj.$model ? obj.$model: obj)
    for (var i = 0; i < $$skipArray.length; i++) {
      var index = arr.indexOf($$skipArray[i])
      if (index !== -1) {
        arr.splice(index, 1)
      }
    }
    return arr
  }
  var descriptorFactory = W3C ? function (obj) {
    var descriptors = {}
    for (var i in obj) {
      descriptors[i] = {
        get: obj[i],
        set: obj[i],
        enumerable: true,
        configurable: true
      }
    }
    return descriptors
  } : function (a) {
    return a
  }

//===================修复浏览器对Object.defineProperties的支持=================
  if (!canHideOwn) {
    if ("__defineGetter__" in avalon) {
      defineProperty = function (obj, prop, desc) {
        if ('value' in desc) {
          obj[prop] = desc.value
        }
        if ("get" in desc) {
          obj.__defineGetter__(prop, desc.get)
        }
        if ('set' in desc) {
          obj.__defineSetter__(prop, desc.set)
        }
        return obj
      }
      defineProperties = function (obj, descs) {
        for (var prop in descs) {
          if (descs.hasOwnProperty(prop)) {
            defineProperty(obj, prop, descs[prop])
          }
        }
        return obj
      }
    }
    if (IEVersion) {
      var VBClassPool = {}
      window.execScript([// jshint ignore:line
        "Function parseVB(code)",
        "\tExecuteGlobal(code)",
        "End Function" //转换一段文本为VB代码
      ].join("\n"), "VBScript")
      function VBMediator(instance, accessors, name, value) {// jshint ignore:line
        var accessor = accessors[name]
        if (arguments.length === 4) {
          accessor.call(instance, value)
        } else {
          return accessor.call(instance)
        }
      }
      defineProperties = function (name, accessors, properties) {
        // jshint ignore:line
        var buffer = []
        buffer.push(
            "\r\n\tPrivate [__data__], [__proxy__]",
            "\tPublic Default Function [__const__](d"+expose+", p"+expose+")",
            "\t\tSet [__data__] = d"+expose+": set [__proxy__] = p"+expose,
            "\t\tSet [__const__] = Me", //链式调用
            "\tEnd Function")
        //添加普通属性,因为VBScript对象不能像JS那样随意增删属性，必须在这里预先定义好
        for (name in properties) {
          if (!accessors.hasOwnProperty(name)) {
            buffer.push("\tPublic [" + name + "]")
          }
        }
        $$skipArray.forEach(function (name) {
          if (!accessors.hasOwnProperty(name)) {
            buffer.push("\tPublic [" + name + "]")
          }
        })
        buffer.push("\tPublic [" + 'hasOwnProperty' + "]")
        //添加访问器属性 
        for (name in accessors) {
          buffer.push(
              //由于不知对方会传入什么,因此set, let都用上
              "\tPublic Property Let [" + name + "](val" + expose + ")", //setter
              "\t\tCall [__proxy__](Me,[__data__], \"" + name + "\", val" + expose + ")",
              "\tEnd Property",
              "\tPublic Property Set [" + name + "](val" + expose + ")", //setter
              "\t\tCall [__proxy__](Me,[__data__], \"" + name + "\", val" + expose + ")",
              "\tEnd Property",
              "\tPublic Property Get [" + name + "]", //getter
              "\tOn Error Resume Next", //必须优先使用set语句,否则它会误将数组当字符串返回
              "\t\tSet[" + name + "] = [__proxy__](Me,[__data__],\"" + name + "\")",
              "\tIf Err.Number <> 0 Then",
              "\t\t[" + name + "] = [__proxy__](Me,[__data__],\"" + name + "\")",
              "\tEnd If",
              "\tOn Error Goto 0",
              "\tEnd Property")

        }

        buffer.push("End Class")
        var body = buffer.join("\r\n")
        var className =VBClassPool[body]
        if (!className) {
          className = generateID("VBClass")
          window.parseVB("Class " + className + body)
          window.parseVB([
            "Function " + className + "Factory(a, b)", //创建实例并传入两个关键的参数
            "\tDim o",
            "\tSet o = (New " + className + ")(a, b)",
            "\tSet " + className + "Factory = o",
            "End Function"
          ].join("\r\n"))
          VBClassPool[body] = className
        }
        var ret = window[className + "Factory"](accessors, VBMediator) //得到其产品
        return ret //得到其产品
      }
    }
  }

  /*********************************************************************
   *          监控数组（与ms-each, ms-repeat配合使用）                     *
   **********************************************************************/

  function arrayFactory(model) {
    var array = []
    array.$id = generateID()
    array.$model = model //数据模型
    array.$events = {}
    array.$events[subscribers] = []
    array._ = modelFactory({
      length: model.length
    })
    array._.$watch("length", function (a, b) {
      array.$fire("length", a, b)
    })
    for (var i in EventBus) {
      array[i] = EventBus[i]
    }
    avalon.mix(array, arrayPrototype)
    return array
  }

  function mutateArray(method, pos, n, index, method2, pos2, n2) {
    var oldLen = this.length, loop = 2
    while (--loop) {
      switch (method) {
        case "add":
          /* jshint ignore:start */
          var array = this.$model.slice(pos, pos + n).map(function (el) {
            if (rcomplexType.test(avalon.type(el))) {
              return el.$id ? el : modelFactory(el, 0, el)
            } else {
              return el
            }
          })
          /* jshint ignore:end */
          _splice.apply(this, [pos, 0].concat(array))
          this._fire("add", pos, n)
          break
        case "del":
          var ret = this._splice(pos, n)
          this._fire("del", pos, n)
          break
      }
      if (method2) {
        method = method2
        pos = pos2
        n = n2
        loop = 2
        method2 = 0
      }
    }
    this._fire("index", index)
    if (this.length !== oldLen) {
      this._.length = this.length
    }
    return ret
  }

  var _splice = ap.splice
  var arrayPrototype = {
    _splice: _splice,
    _fire: function (method, a, b) {
      fireDependencies(this.$events[subscribers], method, a, b)
    },
    size: function () { //取得数组长度，这个函数可以同步视图，length不能
      return this._.length
    },
    pushArray: function (array) {
      var m = array.length, n = this.length
      if (m) {
        ap.push.apply(this.$model, array)
        mutateArray.call(this, "add", n, m, Math.max(0, n - 1))
      }
      return  m + n
    },
    push: function () {
      //http://jsperf.com/closure-with-arguments
      var array = []
      var i, n = arguments.length
      for (i = 0; i < n; i++) {
        array[i] = arguments[i]
      }
      return this.pushArray(array)
    },
    unshift: function () {
      var m = arguments.length, n = this.length
      if (m) {
        ap.unshift.apply(this.$model, arguments)
        mutateArray.call(this, "add", 0, m, 0)
      }
      return  m + n //IE67的unshift不会返回长度
    },
    shift: function () {
      if (this.length) {
        var el = this.$model.shift()
        mutateArray.call(this, "del", 0, 1, 0)
        return el //返回被移除的元素
      }
    },
    pop: function () {
      var n = this.length
      if (n) {
        var el = this.$model.pop()
        mutateArray.call(this, "del", n - 1, 1, Math.max(0, n - 2))
        return el //返回被移除的元素
      }
    },
    splice: function (start) {
      var m = arguments.length, args = [], change
      var removed = _splice.apply(this.$model, arguments)
      if (removed.length) { //如果用户删掉了元素
        args.push("del", start, removed.length, 0)
        change = true
      }
      if (m > 2) {  //如果用户添加了元素
        if (change) {
          args.splice(3, 1, 0, "add", start, m - 2)
        } else {
          args.push("add", start, m - 2, 0)
        }
        change = true
      }
      if (change) { //返回被移除的元素
        return mutateArray.apply(this, args)
      } else {
        return []
      }
    },
    contains: function (el) { //判定是否包含
      return this.indexOf(el) !== -1
    },
    remove: function (el) { //移除第一个等于给定值的元素
      return this.removeAt(this.indexOf(el))
    },
    removeAt: function (index) { //移除指定索引上的元素
      if (index >= 0) {
        this.$model.splice(index, 1)
        return mutateArray.call(this, "del", index, 1, 0)
      }
      return  []
    },
    clear: function () {
      this.$model.length = this.length = this._.length = 0 //清空数组
      this._fire("clear", 0)
      return this
    },
    removeAll: function (all) { //移除N个元素
      if (Array.isArray(all)) {
        for (var i = this.length - 1; i >= 0; i--) {
          if (all.indexOf(this[i]) !== -1) {
            this.removeAt(i)
          }
        }
      } else if (typeof all === "function") {
        for ( i = this.length - 1; i >= 0; i--) {
          var el = this[i]
          if (all(el, i)) {
            this.removeAt(i)
          }
        }
      } else {
        this.clear()
      }
    },
    ensure: function (el) {
      if (!this.contains(el)) { //只有不存在才push
        this.push(el)
      }
      return this
    },
    set: function (index, val) {
      if (index < this.length && index > -1) {
        var valueType = avalon.type(val)
        if (val && val.$model) {
          val = val.$model
        }
        var target = this[index]
        if (valueType === "object") {
          for (var i in val) {
            if (target.hasOwnProperty(i)) {
              target[i] = val[i]
            }
          }
        } else if (valueType === "array") {
          target.clear().push.apply(target, val)
        } else if (target !== val) {
          this[index] = val
          this.$model[index] = val
          this._fire("set", index, val)
        }
      }
      return this
    }
  }
//相当于原来bindingExecutors.repeat 的index分支
  function resetIndex(array, pos) {
    var last = array.length - 1
    for (var el; el = array[pos]; pos++) {
      el.$index = pos
      el.$first = pos === 0
      el.$last = pos === last
    }
  }

  function sortByIndex(array, indexes) {
    var map = {};
    for (var i = 0, n = indexes.length; i < n; i++) {
      map[i] = array[i] // preserve
      var j = indexes[i]
      if (j in map) {
        array[i] = map[j]
        delete map[j]
      } else {
        array[i] = array[j]
      }
    }
  }

  "sort,reverse".replace(rword, function (method) {
    arrayPrototype[method] = function () {
      var newArray = this.$model//这是要排序的新数组
      var oldArray = newArray.concat() //保持原来状态的旧数组
      var mask = Math.random()
      var indexes = []
      var hasSort
      ap[method].apply(newArray, arguments) //排序
      for (var i = 0, n = oldArray.length; i < n; i++) {
        var neo = newArray[i]
        var old = oldArray[i]
        if (isEqual(neo, old)) {
          indexes.push(i)
        } else {
          var index = oldArray.indexOf(neo)
          indexes.push(index)//得到新数组的每个元素在旧数组对应的位置
          oldArray[index] = mask    //屏蔽已经找过的元素
          hasSort = true
        }
      }
      if (hasSort) {
        sortByIndex(this, indexes)
        // sortByIndex(this.$proxy, indexes)
        this._fire("move", indexes)
        this._fire("index", 0)
      }
      return this
    }
  })


  /*********************************************************************
   *                           依赖调度系统                             *
   **********************************************************************/
//检测两个对象间的依赖关系
  var dependencyDetection = (function () {
    var outerFrames = []
    var currentFrame
    return {
      begin: function (accessorObject) {
        //accessorObject为一个拥有callback的对象
        outerFrames.push(currentFrame)
        currentFrame = accessorObject
      },
      end: function () {
        currentFrame = outerFrames.pop()
      },
      collectDependency: function (vmodel, accessor) {
        if (currentFrame) {
          //被dependencyDetection.begin调用
          currentFrame.callback(vmodel, accessor);
        }
      }
    };
  })()
//将绑定对象注入到其依赖项的订阅数组中
  var ronduplex = /^(duplex|on)$/
  avalon.injectBinding = function (data) {
    var valueFn = data.evaluator
    if (valueFn) { //如果是求值函数
      dependencyDetection.begin({
        callback: function (vmodel, dependency) {
          injectDependency(vmodel.$events[dependency._name], data)
        }
      })
      try {
        var value = ronduplex.test(data.type) ? data : valueFn.apply(0, data.args)
        if(value === void 0){
          delete data.evaluator
        }
        data.handler(value, data.element, data)
      } catch (e) {
        log("warning:exception throwed in [avalon.injectBinding] " , e)
        delete data.evaluator
        var node = data.element
        if (node.nodeType === 3) {
          var parent = node.parentNode
          if (kernel.commentInterpolate) {
            parent.replaceChild(DOC.createComment(data.value), node)
          } else {
            node.data = openTag + (data.oneTime ? "::" : "") + data.value + closeTag
          }
        }
      } finally {
        dependencyDetection.end()
      }
    }
  }

//将依赖项(比它高层的访问器或构建视图刷新函数的绑定对象)注入到订阅者数组 
  function injectDependency(list, data) {
    if (data.oneTime)
      return
    if (list && avalon.Array.ensure(list, data) && data.element) {
      injectDisposeQueue(data, list)
      if (new Date() - beginTime > 444 ) {
        rejectDisposeQueue()
      }
    }
  }

//通知依赖于这个访问器的订阅者更新自身
  function fireDependencies(list) {
    if (list && list.length) {
      if (new Date() - beginTime > 444 && typeof list[0] === "object") {
        rejectDisposeQueue()
      }
      var args = aslice.call(arguments, 1)
      for (var i = list.length, fn; fn = list[--i]; ) {
        var el = fn.element
        if (el && el.parentNode) {
          try {
            var valueFn = fn.evaluator
            if (fn.$repeat) {
              fn.handler.apply(fn, args) //处理监控数组的方法
            }else if("$repeat" in fn || !valueFn ){//如果没有eval,先eval
              bindingHandlers[fn.type](fn, fn.vmodels)
            } else if (fn.type !== "on") { //事件绑定只能由用户触发,不能由程序触发
              var value = valueFn.apply(0, fn.args || [])
              fn.handler(value, el, fn)
            }
          } catch (e) {
            console.log(e)
          }
        }
      }
    }
  }
  /*********************************************************************
   *                          定时GC回收机制                             *
   **********************************************************************/
  var disposeCount = 0
  var disposeQueue = avalon.$$subscribers = []
  var beginTime = new Date()
  var oldInfo = {}
//var uuid2Node = {}
  function getUid(elem, makeID) { //IE9+,标准浏览器
    if (!elem.uuid && !makeID) {
      elem.uuid = ++disposeCount
    }
    return elem.uuid
  }

//添加到回收列队中
  function injectDisposeQueue(data, list) {
    var elem = data.element
    if (!data.uuid) {
      if (elem.nodeType !== 1) {
        data.uuid = data.type + (data.pos || 0) + "-" + getUid(elem.parentNode)
      } else {
        data.uuid = data.name + "-" + getUid(elem)
      }
    }
    var lists = data.lists || (data.lists = [])
    avalon.Array.ensure(lists, list)
    list.$uuid = list.$uuid || generateID()
    if (!disposeQueue[data.uuid]) {
      disposeQueue[data.uuid] = 1
      disposeQueue.push(data)
    }
  }

  function rejectDisposeQueue(data) {
    if (avalon.optimize)
      return
    var i = disposeQueue.length
    var n = i
    var allTypes = []
    var iffishTypes = {}
    var newInfo = {}
    //对页面上所有绑定对象进行分门别类, 只检测个数发生变化的类型
    while (data = disposeQueue[--i]) {
      var type = data.type
      if (newInfo[type]) {
        newInfo[type]++
      } else {
        newInfo[type] = 1
        allTypes.push(type)
      }
    }
    var diff = false
    allTypes.forEach(function (type) {
      if (oldInfo[type] !== newInfo[type]) {
        iffishTypes[type] = 1
        diff = true
      }
    })
    i = n
    if (diff) {
      while (data = disposeQueue[--i]) {
        if (data.element === null) {
          disposeQueue.splice(i, 1)
          continue
        }
        if (iffishTypes[data.type] && shouldDispose(data.element)) { //如果它没有在DOM树
          disposeQueue.splice(i, 1)
          delete disposeQueue[data.uuid]
          //delete uuid2Node[data.element.uuid]
          var lists = data.lists
          for (var k = 0, list; list = lists[k++]; ) {
            avalon.Array.remove(lists, list)
            avalon.Array.remove(list, data)
          }
          disposeData(data)
        }
      }
    }
    oldInfo = newInfo
    beginTime = new Date()
  }

  function disposeData(data) {
    delete disposeQueue[data.uuid] // 先清除，不然无法回收了
    data.element = null
    data.rollback && data.rollback()
    for (var key in data) {
      data[key] = null
    }
  }

  function shouldDispose(el) {
    try {//IE下，如果文本节点脱离DOM树，访问parentNode会报错
      var fireError = el.parentNode.nodeType
    } catch (e) {
      return true
    }
    if (el.ifRemove) {
      // 如果节点被放到ifGroup，才移除
      if (!root.contains(el.ifRemove) && (ifGroup === el.parentNode)) {
        el.parentNode && el.parentNode.removeChild(el)
        return true
      }
    }
    return el.msRetain ? 0 : (el.nodeType === 1 ? !root.contains(el) : !avalon.contains(root, el))
  }

  /************************************************************************
   *            HTML处理(parseHTML, innerHTML, clearHTML)                  *
   ************************************************************************/
// We have to close these tags to support XHTML 
  var tagHooks = {
    area: [1, "<map>", "</map>"],
    param: [1, "<object>", "</object>"],
    col: [2, "<table><colgroup>", "</colgroup></table>"],
    legend: [1, "<fieldset>", "</fieldset>"],
    option: [1, "<select multiple='multiple'>", "</select>"],
    thead: [1, "<table>", "</table>"],
    tr: [2, "<table>", "</table>"],
    td: [3, "<table><tr>", "</tr></table>"],
    g: [1, '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1">', '</svg>'],
    //IE6-8在用innerHTML生成节点时，不能直接创建no-scope元素与HTML5的新标签
    _default: W3C ? [0, "", ""] : [1, "X<div>", "</div>"] //div可以不用闭合
  }
  tagHooks.th = tagHooks.td
  tagHooks.optgroup = tagHooks.option
  tagHooks.tbody = tagHooks.tfoot = tagHooks.colgroup = tagHooks.caption = tagHooks.thead
  String("circle,defs,ellipse,image,line,path,polygon,polyline,rect,symbol,text,use").replace(rword, function (tag) {
    tagHooks[tag] = tagHooks.g //处理SVG
  })
  var rtagName = /<([\w:]+)/  //取得其tagName
  var rxhtml = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([\w:]+)[^>]*)\/>/ig
  var rcreate = W3C ? /[^\d\D]/ : /(<(?:script|link|style|meta|noscript))/ig
  var scriptTypes = oneObject(["", "text/javascript", "text/ecmascript", "application/ecmascript", "application/javascript"])
  var rnest = /<(?:tb|td|tf|th|tr|col|opt|leg|cap|area)/ //需要处理套嵌关系的标签
  var script = DOC.createElement("script")
  var rhtml = /<|&#?\w+;/
  avalon.parseHTML = function (html) {
    var fragment = avalonFragment.cloneNode(false)
    if (typeof html !== "string") {
      return fragment
    }
    if (!rhtml.test(html)) {
      fragment.appendChild(DOC.createTextNode(html))
      return fragment
    }
    html = html.replace(rxhtml, "<$1></$2>").trim()
    var tag = (rtagName.exec(html) || ["", ""])[1].toLowerCase(),
    //取得其标签名
        wrap = tagHooks[tag] || tagHooks._default,
        wrapper = cinerator,
        firstChild, neo
    if (!W3C) { //fix IE
      html = html.replace(rcreate, "<br class=msNoScope>$1") //在link style script等标签之前添加一个补丁
    }
    wrapper.innerHTML = wrap[1] + html + wrap[2]
    var els = wrapper.getElementsByTagName("script")
    if (els.length) { //使用innerHTML生成的script节点不会发出请求与执行text属性
      for (var i = 0, el; el = els[i++]; ) {
        if (scriptTypes[el.type]) {
          //以偷龙转凤方式恢复执行脚本功能
          neo = script.cloneNode(false) //FF不能省略参数
          ap.forEach.call(el.attributes, function (attr) {
            if (attr && attr.specified) {
              neo[attr.name] = attr.value //复制其属性
              neo.setAttribute(attr.name, attr.value)
            }
          })  // jshint ignore:line
          neo.text = el.text
          el.parentNode.replaceChild(neo, el) //替换节点
        }
      }
    }
    if (!W3C) { //fix IE
      var target = wrap[1] === "X<div>" ? wrapper.lastChild.firstChild : wrapper.lastChild
      if (target && target.tagName === "TABLE" && tag !== "tbody") {
        //IE6-7处理 <thead> --> <thead>,<tbody>
        //<tfoot> --> <tfoot>,<tbody>
        //<table> --> <table><tbody></table>
        for (els = target.childNodes, i = 0; el = els[i++]; ) {
          if (el.tagName === "TBODY" && !el.innerHTML) {
            target.removeChild(el)
            break
          }
        }
      }
      els = wrapper.getElementsByTagName("br")
      var n = els.length
      while (el = els[--n]) {
        if (el.className === "msNoScope") {
          el.parentNode.removeChild(el)
        }
      }
      for (els = wrapper.all, i = 0; el = els[i++]; ) { //fix VML
        if (isVML(el)) {
          fixVML(el)
        }
      }
    }
    //移除我们为了符合套嵌关系而添加的标签
    for (i = wrap[0]; i--; wrapper = wrapper.lastChild) {
    }
    while (firstChild = wrapper.firstChild) { // 将wrapper上的节点转移到文档碎片上！
      fragment.appendChild(firstChild)
    }
    return fragment
  }

  function isVML(src) {
    var nodeName = src.nodeName
    return nodeName.toLowerCase() === nodeName && src.scopeName && src.outerText === ""
  }

  function fixVML(node) {
    if (node.currentStyle.behavior !== "url(#default#VML)") {
      node.style.behavior = "url(#default#VML)"
      node.style.display = "inline-block"
      node.style.zoom = 1 //hasLayout
    }
  }
  avalon.innerHTML = function (node, html) {
    if (!W3C && (!rcreate.test(html) && !rnest.test(html))) {
      try {
        node.innerHTML = html
        return
      } catch (e) {
      }
    }
    var a = this.parseHTML(html)
    this.clearHTML(node).appendChild(a)
  }
  avalon.clearHTML = function (node) {
    node.textContent = ""
    while (node.firstChild) {
      node.removeChild(node.firstChild)
    }
    return node
  }

  /*********************************************************************
   *                  avalon的原型方法定义区                            *
   **********************************************************************/

  function hyphen(target) {
    //转换为连字符线风格
    return target.replace(/([a-z\d])([A-Z]+)/g, "$1-$2").toLowerCase()
  }

  function camelize(target) {
    //提前判断，提高getStyle等的效率
    if (!target || target.indexOf("-") < 0 && target.indexOf("_") < 0) {
      return target
    }
    //转换为驼峰风格
    return target.replace(/[-_][^-_]/g, function(match) {
      return match.charAt(1).toUpperCase()
    })
  }

  var fakeClassListMethods = {
    _toString: function() {
      var node = this.node
      var cls = node.className
      var str = typeof cls === "string" ? cls : cls.baseVal
      return str.split(/\s+/).join(" ")
    },
    _contains: function(cls) {
      return (" " + this + " ").indexOf(" " + cls + " ") > -1
    },
    _add: function(cls) {
      if (!this.contains(cls)) {
        this._set(this + " " + cls)
      }
    },
    _remove: function(cls) {
      this._set((" " + this + " ").replace(" " + cls + " ", " "))
    },
    __set: function(cls) {
      cls = cls.trim()
      var node = this.node
      if (rsvg.test(node)) {
        //SVG元素的className是一个对象 SVGAnimatedString { baseVal="", animVal=""}，只能通过set/getAttribute操作
        node.setAttribute("class", cls)
      } else {
        node.className = cls
      }
    } //toggle存在版本差异，因此不使用它
  }

  function fakeClassList(node) {
    if (!("classList" in node)) {
      node.classList = {
        node: node
      }
      for (var k in fakeClassListMethods) {
        node.classList[k.slice(1)] = fakeClassListMethods[k]
      }
    }
    return node.classList
  }


  "add,remove".replace(rword, function(method) {
    avalon.fn[method + "Class"] = function(cls) {
      var el = this[0]
      //https://developer.mozilla.org/zh-CN/docs/Mozilla/Firefox/Releases/26
      if (cls && typeof cls === "string" && el && el.nodeType === 1) {
        cls.replace(/\S+/g, function(c) {
          fakeClassList(el)[method](c)
        })
      }
      return this
    }
  })
  avalon.fn.mix({
    hasClass: function(cls) {
      var el = this[0] || {}
      return el.nodeType === 1 && fakeClassList(el).contains(cls)
    },
    toggleClass: function(value, stateVal) {
      var className, i = 0
      var classNames = String(value).split(/\s+/)
      var isBool = typeof stateVal === "boolean"
      while ((className = classNames[i++])) {
        var state = isBool ? stateVal : !this.hasClass(className)
        this[state ? "addClass" : "removeClass"](className)
      }
      return this
    },
    attr: function(name, value) {
      if (arguments.length === 2) {
        this[0].setAttribute(name, value)
        return this
      } else {
        return this[0].getAttribute(name)
      }
    },
    data: function(name, value) {
      name = "data-" + hyphen(name || "")
      switch (arguments.length) {
        case 2:
          this.attr(name, value)
          return this
        case 1:
          var val = this.attr(name)
          return parseData(val)
        case 0:
          var ret = {}
          ap.forEach.call(this[0].attributes, function(attr) {
            if (attr) {
              name = attr.name
              if (!name.indexOf("data-")) {
                name = camelize(name.slice(5))
                ret[name] = parseData(attr.value)
              }
            }
          })
          return ret
      }
    },
    removeData: function(name) {
      name = "data-" + hyphen(name)
      this[0].removeAttribute(name)
      return this
    },
    css: function(name, value) {
      if (avalon.isPlainObject(name)) {
        for (var i in name) {
          avalon.css(this, i, name[i])
        }
      } else {
        var ret = avalon.css(this, name, value)
      }
      return ret !== void 0 ? ret : this
    },
    position: function() {
      var offsetParent, offset,
          elem = this[0],
          parentOffset = {
            top: 0,
            left: 0
          }
      if (!elem) {
        return
      }
      if (this.css("position") === "fixed") {
        offset = elem.getBoundingClientRect()
      } else {
        offsetParent = this.offsetParent() //得到真正的offsetParent
        offset = this.offset() // 得到正确的offsetParent
        if (offsetParent[0].tagName !== "HTML") {
          parentOffset = offsetParent.offset()
        }
        parentOffset.top += avalon.css(offsetParent[0], "borderTopWidth", true)
        parentOffset.left += avalon.css(offsetParent[0], "borderLeftWidth", true)

        // Subtract offsetParent scroll positions
        parentOffset.top -= offsetParent.scrollTop()
        parentOffset.left -= offsetParent.scrollLeft()
      }
      return {
        top: offset.top - parentOffset.top - avalon.css(elem, "marginTop", true),
        left: offset.left - parentOffset.left - avalon.css(elem, "marginLeft", true)
      }
    },
    offsetParent: function() {
      var offsetParent = this[0].offsetParent
      while (offsetParent && avalon.css(offsetParent, "position") === "static") {
        offsetParent = offsetParent.offsetParent;
      }
      return avalon(offsetParent || root)
    },
    bind: function(type, fn, phase) {
      if (this[0]) { //此方法不会链
        return avalon.bind(this[0], type, fn, phase)
      }
    },
    unbind: function(type, fn, phase) {
      if (this[0]) {
        avalon.unbind(this[0], type, fn, phase)
      }
      return this
    },
    val: function(value) {
      var node = this[0]
      if (node && node.nodeType === 1) {
        var get = arguments.length === 0
        var access = get ? ":get" : ":set"
        var fn = valHooks[getValType(node) + access]
        if (fn) {
          var val = fn(node, value)
        } else if (get) {
          return (node.value || "").replace(/\r/g, "")
        } else {
          node.value = value
        }
      }
      return get ? val : this
    }
  })

  function parseData(data) {
    try {
      if (typeof data === "object")
        return data
      data = data === "true" ? true :
          data === "false" ? false :
              data === "null" ? null : +data + "" === data ? +data : rbrace.test(data) ? avalon.parseJSON(data) : data
    } catch (e) {}
    return data
  }
  var rbrace = /(?:\{[\s\S]*\}|\[[\s\S]*\])$/,
      rvalidchars = /^[\],:{}\s]*$/,
      rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g,
      rvalidescape = /\\(?:["\\\/bfnrt]|u[\da-fA-F]{4})/g,
      rvalidtokens = /"[^"\\\r\n]*"|true|false|null|-?(?:\d+\.|)\d+(?:[eE][+-]?\d+|)/g
  avalon.parseJSON = window.JSON ? JSON.parse : function(data) {
    if (typeof data === "string") {
      data = data.trim();
      if (data) {
        if (rvalidchars.test(data.replace(rvalidescape, "@")
                .replace(rvalidtokens, "]")
                .replace(rvalidbraces, ""))) {
          return (new Function("return " + data))() // jshint ignore:line
        }
      }
      avalon.error("Invalid JSON: " + data)
    }
    return data
  }

//生成avalon.fn.scrollLeft, avalon.fn.scrollTop方法
  avalon.each({
    scrollLeft: "pageXOffset",
    scrollTop: "pageYOffset"
  }, function(method, prop) {
    avalon.fn[method] = function(val) {
      var node = this[0] || {}, win = getWindow(node),
          top = method === "scrollTop"
      if (!arguments.length) {
        return win ? (prop in win) ? win[prop] : root[method] : node[method]
      } else {
        if (win) {
          win.scrollTo(!top ? val : avalon(win).scrollLeft(), top ? val : avalon(win).scrollTop())
        } else {
          node[method] = val
        }
      }
    }
  })

  function getWindow(node) {
    return node.window && node.document ? node : node.nodeType === 9 ? node.defaultView || node.parentWindow : false;
  }
//=============================css相关=======================
  var cssHooks = avalon.cssHooks = {}
  var prefixes = ["", "-webkit-", "-o-", "-moz-", "-ms-"]
  var cssMap = {
    "float": W3C ? "cssFloat" : "styleFloat"
  }
  avalon.cssNumber = oneObject("animationIterationCount,columnCount,order,flex,flexGrow,flexShrink,fillOpacity,fontWeight,lineHeight,opacity,orphans,widows,zIndex,zoom")

  avalon.cssName = function(name, host, camelCase) {
    if (cssMap[name]) {
      return cssMap[name]
    }
    host = host || root.style
    for (var i = 0, n = prefixes.length; i < n; i++) {
      camelCase = camelize(prefixes[i] + name)
      if (camelCase in host) {
        return (cssMap[name] = camelCase)
      }
    }
    return null
  }
  cssHooks["@:set"] = function(node, name, value) {
    try { //node.style.width = NaN;node.style.width = "xxxxxxx";node.style.width = undefine 在旧式IE下会抛异常
      node.style[name] = value
    } catch (e) {}
  }
  if (window.getComputedStyle) {
    cssHooks["@:get"] = function(node, name) {
      if (!node || !node.style) {
        throw new Error("getComputedStyle要求传入一个节点 " + node)
      }
      var ret, styles = getComputedStyle(node, null)
      if (styles) {
        ret = name === "filter" ? styles.getPropertyValue(name) : styles[name]
        if (ret === "") {
          ret = node.style[name] //其他浏览器需要我们手动取内联样式
        }
      }
      return ret
    }
    cssHooks["opacity:get"] = function(node) {
      var ret = cssHooks["@:get"](node, "opacity")
      return ret === "" ? "1" : ret
    }
  } else {
    var rnumnonpx = /^-?(?:\d*\.)?\d+(?!px)[^\d\s]+$/i
    var rposition = /^(top|right|bottom|left)$/
    var ralpha = /alpha\([^)]*\)/i
    var ie8 = !! window.XDomainRequest
    var salpha = "DXImageTransform.Microsoft.Alpha"
    var border = {
      thin: ie8 ? '1px' : '2px',
      medium: ie8 ? '3px' : '4px',
      thick: ie8 ? '5px' : '6px'
    }
    cssHooks["@:get"] = function(node, name) {
      //取得精确值，不过它有可能是带em,pc,mm,pt,%等单位
      var currentStyle = node.currentStyle
      var ret = currentStyle[name]
      if ((rnumnonpx.test(ret) && !rposition.test(ret))) {
        //①，保存原有的style.left, runtimeStyle.left,
        var style = node.style,
            left = style.left,
            rsLeft = node.runtimeStyle.left
        //②由于③处的style.left = xxx会影响到currentStyle.left，
        //因此把它currentStyle.left放到runtimeStyle.left，
        //runtimeStyle.left拥有最高优先级，不会style.left影响
        node.runtimeStyle.left = currentStyle.left
        //③将精确值赋给到style.left，然后通过IE的另一个私有属性 style.pixelLeft
        //得到单位为px的结果；fontSize的分支见http://bugs.jquery.com/ticket/760
        style.left = name === 'fontSize' ? '1em' : (ret || 0)
        ret = style.pixelLeft + "px"
        //④还原 style.left，runtimeStyle.left
        style.left = left
        node.runtimeStyle.left = rsLeft
      }
      if (ret === "medium") {
        name = name.replace("Width", "Style")
        //border width 默认值为medium，即使其为0"
        if (currentStyle[name] === "none") {
          ret = "0px"
        }
      }
      return ret === "" ? "auto" : border[ret] || ret
    }
    cssHooks["opacity:set"] = function(node, name, value) {
      var style = node.style
      var opacity = isFinite(value) && value <= 1 ? "alpha(opacity=" + value * 100 + ")" : ""
      var filter = style.filter || "";
      style.zoom = 1
      //不能使用以下方式设置透明度
      //node.filters.alpha.opacity = value * 100
      style.filter = (ralpha.test(filter) ?
          filter.replace(ralpha, opacity) :
      filter + " " + opacity).trim()
      if (!style.filter) {
        style.removeAttribute("filter")
      }
    }
    cssHooks["opacity:get"] = function(node) {
      //这是最快的获取IE透明值的方式，不需要动用正则了！
      var alpha = node.filters.alpha || node.filters[salpha],
          op = alpha && alpha.enabled ? alpha.opacity : 100
      return (op / 100) + "" //确保返回的是字符串
    }
  }

  "top,left".replace(rword, function(name) {
    cssHooks[name + ":get"] = function(node) {
      var computed = cssHooks["@:get"](node, name)
      return /px$/.test(computed) ? computed :
      avalon(node).position()[name] + "px"
    }
  })

  var cssShow = {
    position: "absolute",
    visibility: "hidden",
    display: "block"
  }

  var rdisplayswap = /^(none|table(?!-c[ea]).+)/

  function showHidden(node, array) {
    //http://www.cnblogs.com/rubylouvre/archive/2012/10/27/2742529.html
    if (node.offsetWidth <= 0) { //opera.offsetWidth可能小于0
      if (rdisplayswap.test(cssHooks["@:get"](node, "display"))) {
        var obj = {
          node: node
        }
        for (var name in cssShow) {
          obj[name] = node.style[name]
          node.style[name] = cssShow[name]
        }
        array.push(obj)
      }
      var parent = node.parentNode
      if (parent && parent.nodeType === 1) {
        showHidden(parent, array)
      }
    }
  }
  "Width,Height".replace(rword, function(name) { //fix 481
    var method = name.toLowerCase(),
        clientProp = "client" + name,
        scrollProp = "scroll" + name,
        offsetProp = "offset" + name
    cssHooks[method + ":get"] = function(node, which, override) {
      var boxSizing = -4
      if (typeof override === "number") {
        boxSizing = override
      }
      which = name === "Width" ? ["Left", "Right"] : ["Top", "Bottom"]
      var ret = node[offsetProp] // border-box 0
      if (boxSizing === 2) { // margin-box 2
        return ret + avalon.css(node, "margin" + which[0], true) + avalon.css(node, "margin" + which[1], true)
      }
      if (boxSizing < 0) { // padding-box  -2
        ret = ret - avalon.css(node, "border" + which[0] + "Width", true) - avalon.css(node, "border" + which[1] + "Width", true)
      }
      if (boxSizing === -4) { // content-box -4
        ret = ret - avalon.css(node, "padding" + which[0], true) - avalon.css(node, "padding" + which[1], true)
      }
      return ret
    }
    cssHooks[method + "&get"] = function(node) {
      var hidden = [];
      showHidden(node, hidden);
      var val = cssHooks[method + ":get"](node)
      for (var i = 0, obj; obj = hidden[i++];) {
        node = obj.node
        for (var n in obj) {
          if (typeof obj[n] === "string") {
            node.style[n] = obj[n]
          }
        }
      }
      return val;
    }
    avalon.fn[method] = function(value) { //会忽视其display
      var node = this[0]
      if (arguments.length === 0) {
        if (node.setTimeout) { //取得窗口尺寸,IE9后可以用node.innerWidth /innerHeight代替
          return node["inner" + name] || node.document.documentElement[clientProp]
              || node.document.body[clientProp]//IE6下前两个分别为undefine,0
        }
        if (node.nodeType === 9) { //取得页面尺寸
          var doc = node.documentElement
          //FF chrome    html.scrollHeight< body.scrollHeight
          //IE 标准模式 : html.scrollHeight> body.scrollHeight
          //IE 怪异模式 : html.scrollHeight 最大等于可视窗口多一点？
          return Math.max(node.body[scrollProp], doc[scrollProp], node.body[offsetProp], doc[offsetProp], doc[clientProp])
        }
        return cssHooks[method + "&get"](node)
      } else {
        return this.css(method, value)
      }
    }
    avalon.fn["inner" + name] = function() {
      return cssHooks[method + ":get"](this[0], void 0, -2)
    }
    avalon.fn["outer" + name] = function(includeMargin) {
      return cssHooks[method + ":get"](this[0], void 0, includeMargin === true ? 2 : 0)
    }
  })
  avalon.fn.offset = function() { //取得距离页面左右角的坐标
    var node = this[0],
        box = {
          left: 0,
          top: 0
        }
    if (!node || !node.tagName || !node.ownerDocument) {
      return box
    }
    var doc = node.ownerDocument,
        body = doc.body,
        root = doc.documentElement,
        win = doc.defaultView || doc.parentWindow
    if (!avalon.contains(root, node)) {
      return box
    }
    //http://hkom.blog1.fc2.com/?mode=m&no=750 body的偏移量是不包含margin的
    //我们可以通过getBoundingClientRect来获得元素相对于client的rect.
    //http://msdn.microsoft.com/en-us/library/ms536433.aspx
    if (node.getBoundingClientRect) {
      box = node.getBoundingClientRect() // BlackBerry 5, iOS 3 (original iPhone)
    }
    //chrome/IE6: body.scrollTop, firefox/other: root.scrollTop
    var clientTop = root.clientTop || body.clientTop,
        clientLeft = root.clientLeft || body.clientLeft,
        scrollTop = Math.max(win.pageYOffset || 0, root.scrollTop, body.scrollTop),
        scrollLeft = Math.max(win.pageXOffset || 0, root.scrollLeft, body.scrollLeft)
    // 把滚动距离加到left,top中去。
    // IE一些版本中会自动为HTML元素加上2px的border，我们需要去掉它
    // http://msdn.microsoft.com/en-us/library/ms533564(VS.85).aspx
    return {
      top: box.top + scrollTop - clientTop,
      left: box.left + scrollLeft - clientLeft
    }
  }

  //==================================val相关============================

  function getValType(elem) {
    var ret = elem.tagName.toLowerCase()
    return ret === "input" && /checkbox|radio/.test(elem.type) ? "checked" : ret
  }
  var roption = /^<option(?:\s+\w+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s>]+))?)*\s+value[\s=]/i
  var valHooks = {
    "option:get": IEVersion ? function(node) {
      //在IE11及W3C，如果没有指定value，那么node.value默认为node.text（存在trim作），但IE9-10则是取innerHTML(没trim操作)
      //specified并不可靠，因此通过分析outerHTML判定用户有没有显示定义value
      return roption.test(node.outerHTML) ? node.value : node.text.trim()
    } : function(node) {
      return node.value
    },
    "select:get": function(node, value) {
      var option, options = node.options,
          index = node.selectedIndex,
          getter = valHooks["option:get"],
          one = node.type === "select-one" || index < 0,
          values = one ? null : [],
          max = one ? index + 1 : options.length,
          i = index < 0 ? max : one ? index : 0
      for (; i < max; i++) {
        option = options[i]
        //旧式IE在reset后不会改变selected，需要改用i === index判定
        //我们过滤所有disabled的option元素，但在safari5下，如果设置select为disable，那么其所有孩子都disable
        //因此当一个元素为disable，需要检测其是否显式设置了disable及其父节点的disable情况
        if ((option.selected || i === index) && !option.disabled) {
          value = getter(option)
          if (one) {
            return value
          }
          //收集所有selected值组成数组返回
          values.push(value)
        }
      }
      return values
    },
    "select:set": function(node, values, optionSet) {
      values = [].concat(values) //强制转换为数组
      var getter = valHooks["option:get"]
      for (var i = 0, el; el = node.options[i++];) {
        if ((el.selected = values.indexOf(getter(el)) > -1)) {
          optionSet = true
        }
      }
      if (!optionSet) {
        node.selectedIndex = -1
      }
    }
  }

  /*********************************************************************
   *                          编译系统                                  *
   **********************************************************************/
  var meta = {
    '\b': '\\b',
    '\t': '\\t',
    '\n': '\\n',
    '\f': '\\f',
    '\r': '\\r',
    '"': '\\"',
    '\\': '\\\\'
  }
  var quote = window.JSON && JSON.stringify || function(str) {
        return '"' + str.replace(/[\\\"\x00-\x1f]/g, function(a) {
              var c = meta[a];
              return typeof c === 'string' ? c :
              '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
            }) + '"'
      }

  var keywords = [
    "break,case,catch,continue,debugger,default,delete,do,else,false",
    "finally,for,function,if,in,instanceof,new,null,return,switch,this",
    "throw,true,try,typeof,var,void,while,with", /* 关键字*/
    "abstract,boolean,byte,char,class,const,double,enum,export,extends",
    "final,float,goto,implements,import,int,interface,long,native",
    "package,private,protected,public,short,static,super,synchronized",
    "throws,transient,volatile", /*保留字*/
    "arguments,let,yield,undefined" /* ECMA 5 - use strict*/].join(",")
  var rrexpstr = /\/\*[\w\W]*?\*\/|\/\/[^\n]*\n|\/\/[^\n]*$|"(?:[^"\\]|\\[\w\W])*"|'(?:[^'\\]|\\[\w\W])*'|[\s\t\n]*\.[\s\t\n]*[$\w\.]+/g
  var rsplit = /[^\w$]+/g
  var rkeywords = new RegExp(["\\b" + keywords.replace(/,/g, '\\b|\\b') + "\\b"].join('|'), 'g')
  var rnumber = /\b\d[^,]*/g
  var rcomma = /^,+|,+$/g
  var variablePool = new Cache(512)
  var getVariables = function (code) {
    var key = "," + code.trim()
    var ret = variablePool.get(key)
    if (ret) {
      return ret
    }
    var match = code
        .replace(rrexpstr, "")
        .replace(rsplit, ",")
        .replace(rkeywords, "")
        .replace(rnumber, "")
        .replace(rcomma, "")
        .split(/^$|,+/)
    return variablePool.put(key, uniqSet(match))
  }
  /*添加赋值语句*/

  function addAssign(vars, scope, name, data) {
    var ret = [],
        prefix = " = " + name + "."
    for (var i = vars.length, prop; prop = vars[--i]; ) {
      if (scope.hasOwnProperty(prop)) {
        ret.push(prop + prefix + prop)
        data.vars.push(prop)
        if (data.type === "duplex") {
          vars.get = name + "." + prop
        }
        vars.splice(i, 1)
      }
    }
    return ret
  }

  function uniqSet(array) {
    var ret = [],
        unique = {}
    for (var i = 0; i < array.length; i++) {
      var el = array[i]
      var id = el && typeof el.$id === "string" ? el.$id : el
      if (!unique[id]) {
        unique[id] = ret.push(el)
      }
    }
    return ret
  }
//缓存求值函数，以便多次利用
  var evaluatorPool = new Cache(128)
//取得求值函数及其传参
  var rduplex = /\w\[.*\]|\w\.\w/
  var rproxy = /(\$proxy\$[a-z]+)\d+$/
  var rthimRightParentheses = /\)\s*$/
  var rthimOtherParentheses = /\)\s*\|/g
  var rquoteFilterName = /\|\s*([$\w]+)/g
  var rpatchBracket = /"\s*\["/g
  var rthimLeftParentheses = /"\s*\(/g
  function parseFilter(val, filters) {
    filters = filters
            .replace(rthimRightParentheses, "")//处理最后的小括号
            .replace(rthimOtherParentheses, function () {//处理其他小括号
              return "],|"
            })
            .replace(rquoteFilterName, function (a, b) { //处理|及它后面的过滤器的名字
              return "[" + quote(b)
            })
            .replace(rpatchBracket, function () {
              return '"],["'
            })
            .replace(rthimLeftParentheses, function () {
              return '",'
            }) + "]"
    return  "return this.filters.$filter(" + val + ", " + filters + ")"
  }

  function parseExpr(code, scopes, data) {
    var dataType = data.type
    var filters = data.filters || ""
    var exprId = scopes.map(function (el) {
          return String(el.$id).replace(rproxy, "$1")
        }) + code + dataType + filters
    var vars = getVariables(code).concat(),
        assigns = [],
        names = [],
        args = [],
        prefix = ""
    //args 是一个对象数组， names 是将要生成的求值函数的参数
    scopes = uniqSet(scopes)
    data.vars = []
    for (var i = 0, sn = scopes.length; i < sn; i++) {
      if (vars.length) {
        var name = "vm" + expose + "_" + i
        names.push(name)
        args.push(scopes[i])
        assigns.push.apply(assigns, addAssign(vars, scopes[i], name, data))
      }
    }
    if (!assigns.length && dataType === "duplex") {
      return
    }
    if (dataType !== "duplex" && (code.indexOf("||") > -1 || code.indexOf("&&") > -1)) {
      //https://github.com/RubyLouvre/avalon/issues/583
      data.vars.forEach(function (v) {
        var reg = new RegExp("\\b" + v + "(?:\\.\\w+|\\[\\w+\\])+", "ig")
        code = code.replace(reg, function (_, cap) {
          var c = _.charAt(v.length)
          //var r = IEVersion ? code.slice(arguments[1] + _.length) : RegExp.rightContext
          //https://github.com/RubyLouvre/avalon/issues/966
          var r = code.slice(cap + _.length)
          var method = /^\s*\(/.test(r)
          if (c === "." || c === "[" || method) {//比如v为aa,我们只匹配aa.bb,aa[cc],不匹配aaa.xxx
            var name = "var" + String(Math.random()).replace(/^0\./, "")
            if (method) {//array.size()
              var array = _.split(".")
              if (array.length > 2) {
                var last = array.pop()
                assigns.push(name + " = " + array.join("."))
                return name + "." + last
              } else {
                return _
              }
            }
            assigns.push(name + " = " + _)
            return name
          } else {
            return _
          }
        })
      })
    }
    //---------------args----------------
    data.args = args
    //---------------cache----------------
    delete data.vars
    var fn = evaluatorPool.get(exprId) //直接从缓存，免得重复生成
    if (fn) {
      data.evaluator = fn
      return
    }
    prefix = assigns.join(", ")
    if (prefix) {
      prefix = "var " + prefix
    }
    if (/\S/.test(filters)) { //文本绑定，双工绑定才有过滤器
      if (!/text|html/.test(data.type)) {
        throw Error("ms-" + data.type + "不支持过滤器")
      }
      code = "\nvar ret" + expose + " = " + code + ";\r\n"
      code += parseFilter("ret" + expose, filters)
      try {
        fn = Function.apply(noop, names.concat("'use strict';\n" + prefix + code))
        data.evaluator = evaluatorPool.put(exprId, function() {
          return fn.apply(avalon, arguments)//确保可以在编译代码中使用this获取avalon对象
        })
      } catch (e) {
        log("debug: parse error," + e.message)
      }
      vars = assigns = names = null //释放内存
      return
    } else if (dataType === "duplex") { //双工绑定
      var _body = "'use strict';\nreturn function(vvv){\n\t" +
          prefix +
          ";\n\tif(!arguments.length){\n\t\treturn " +
          code +
          "\n\t}\n\t" + (!rduplex.test(code) ? vars.get : code) +
          "= vvv;\n} "
      try {
        fn = Function.apply(noop, names.concat(_body))
        data.evaluator = evaluatorPool.put(exprId, fn)
      } catch (e) {
        log("debug: parse error," + e.message)
      }
      vars = assigns = names = null //释放内存
      return
    } else if (dataType === "on") { //事件绑定
      if (code.indexOf("(") === -1) {
        code += ".call(this, $event)"
      } else {
        code = code.replace("(", ".call(this,")
      }
      names.push("$event")
      code = "\nreturn " + code + ";" //IE全家 Function("return ")出错，需要Function("return ;")
      var lastIndex = code.lastIndexOf("\nreturn")
      var header = code.slice(0, lastIndex)
      var footer = code.slice(lastIndex)
      code = header + "\n" + footer
    } else { //其他绑定
      code = "\nreturn " + code + ";" //IE全家 Function("return ")出错，需要Function("return ;")
    }
    try {
      fn = Function.apply(noop, names.concat("'use strict';\n" + prefix + code))
      data.evaluator = evaluatorPool.put(exprId, fn)
    } catch (e) {
      log("debug: parse error," + e.message)
    }
    vars = assigns = names = null //释放内存
  }
  function stringifyExpr(code) {
    var hasExpr = rexpr.test(code) //比如ms-class="width{{w}}"的情况
    if (hasExpr) {
      var array = scanExpr(code)
      if (array.length === 1) {
        return array[0].value
      }
      return array.map(function (el) {
        return el.expr ? "(" + el.value + ")" : quote(el.value)
      }).join(" + ")
    } else {
      return code
    }
  }
//parseExpr的智能引用代理

  function parseExprProxy(code, scopes, data, noRegister) {
    code = code || "" //code 可能未定义
    parseExpr(code, scopes, data)
    if (data.evaluator && !noRegister) {
      data.handler = bindingExecutors[data.handlerName || data.type]
      //方便调试
      //这里非常重要,我们通过判定视图刷新函数的element是否在DOM树决定
      //将它移出订阅者列表
      avalon.injectBinding(data)
    }
  }
  avalon.parseExprProxy = parseExprProxy
  /*********************************************************************
   *                           扫描系统                                 *
   **********************************************************************/

  avalon.scan = function(elem, vmodel) {
    elem = elem || root
    var vmodels = vmodel ? [].concat(vmodel) : []
    scanTag(elem, vmodels)
  }

//http://www.w3.org/TR/html5/syntax.html#void-elements
  var stopScan = oneObject("area,base,basefont,br,col,command,embed,hr,img,input,link,meta,param,source,track,wbr,noscript,script,style,textarea".toUpperCase())

  function checkScan(elem, callback, innerHTML) {
    var id = setTimeout(function() {
      var currHTML = elem.innerHTML
      clearTimeout(id)
      if (currHTML === innerHTML) {
        callback()
      } else {
        checkScan(elem, callback, currHTML)
      }
    })
  }


  function createSignalTower(elem, vmodel) {
    var id = elem.getAttribute("avalonctrl") || vmodel.$id
    elem.setAttribute("avalonctrl", id)
    vmodel.$events.expr = elem.tagName + '[avalonctrl="' + id + '"]'
  }

  var getBindingCallback = function(elem, name, vmodels) {
    var callback = elem.getAttribute(name)
    if (callback) {
      for (var i = 0, vm; vm = vmodels[i++]; ) {
        if (vm.hasOwnProperty(callback) && typeof vm[callback] === "function") {
          return vm[callback]
        }
      }
    }
  }

  function executeBindings(bindings, vmodels) {
    for (var i = 0, data; data = bindings[i++]; ) {
      data.vmodels = vmodels
      bindingHandlers[data.type](data, vmodels)
      if (data.evaluator && data.element && data.element.nodeType === 1) { //移除数据绑定，防止被二次解析
        //chrome使用removeAttributeNode移除不存在的特性节点时会报错 https://github.com/RubyLouvre/avalon/issues/99
        data.element.removeAttribute(data.name)
      }
    }
    bindings.length = 0
  }

//https://github.com/RubyLouvre/avalon/issues/636
  var mergeTextNodes = IEVersion && window.MutationObserver ? function (elem) {
    var node = elem.firstChild, text
    while (node) {
      var aaa = node.nextSibling
      if (node.nodeType === 3) {
        if (text) {
          text.nodeValue += node.nodeValue
          elem.removeChild(node)
        } else {
          text = node
        }
      } else {
        text = null
      }
      node = aaa
    }
  } : 0
  var roneTime = /^\s*::/
  var rmsAttr = /ms-(\w+)-?(.*)/
  var priorityMap = {
    "if": 10,
    "repeat": 90,
    "data": 100,
    "widget": 110,
    "each": 1400,
    "with": 1500,
    "duplex": 2000,
    "on": 3000
  }

  var events = oneObject("animationend,blur,change,input,click,dblclick,focus,keydown,keypress,keyup,mousedown,mouseenter,mouseleave,mousemove,mouseout,mouseover,mouseup,scan,scroll,submit")
  var obsoleteAttrs = oneObject("value,title,alt,checked,selected,disabled,readonly,enabled")
  function bindingSorter(a, b) {
    return a.priority - b.priority
  }

  function scanAttr(elem, vmodels, match) {
    var scanNode = true
    if (vmodels.length) {
      var attributes = getAttributes ? getAttributes(elem) : elem.attributes
      var bindings = []
      var fixAttrs = []
      var msData = {}
      var uniq = {}
      for (var i = 0, attr; attr = attributes[i++]; ) {
        if (attr.specified) {
          if (match = attr.name.match(rmsAttr)) {
            //如果是以指定前缀命名的
            var type = match[1]
            var param = match[2] || ""
            var value = attr.value
            var name = attr.name
            if (uniq[name]) {//IE8下ms-repeat,ms-with BUG
              continue
            }
            uniq[name] = 1
            if (events[type]) {
              param = type
              type = "on"
            } else if (obsoleteAttrs[type]) {
              if (type === "enabled") {//吃掉ms-enabled绑定,用ms-disabled代替
                log("warning!ms-enabled或ms-attr-enabled已经被废弃")
                type = "disabled"
                value = "!(" + value + ")"
              }
              param = type
              type = "attr"
              name = "ms-" + type + "-" + param
              fixAttrs.push([attr.name, name, value])
            }
            msData[name] = value
            if (typeof bindingHandlers[type] === "function") {
              var newValue = value.replace(roneTime, "")
              var oneTime = value !== newValue
              var binding = {
                type: type,
                param: param,
                element: elem,
                name: name,
                value: newValue,
                oneTime: oneTime,
                uuid: name + "-" + getUid(elem),
                //chrome与firefox下Number(param)得到的值不一样 #855
                priority: (priorityMap[type] || type.charCodeAt(0) * 10) + (Number(param.replace(/\D/g, "")) || 0)
              }
              if (type === "html" || type === "text") {
                var token = getToken(value)
                avalon.mix(binding, token)
                binding.filters = binding.filters.replace(rhasHtml, function () {
                  binding.type = "html"
                  binding.group = 1
                  return ""
                })// jshint ignore:line
              } else if (type === "duplex") {
                var hasDuplex = name
              } else if (name === "ms-if-loop") {
                binding.priority += 100
              }
              bindings.push(binding)
              if (type === "widget") {
                elem.msData = elem.msData || msData
              }
            }
          }
        }
      }
      if (bindings.length) {
        bindings.sort(bindingSorter)
        fixAttrs.forEach(function (arr) {
          log("warning!请改用" + arr[1] + "代替" + arr[0] + "!")
          elem.removeAttribute(arr[0])
          elem.setAttribute(arr[1], arr[2])
        })
        //http://bugs.jquery.com/ticket/7071
        //在IE下对VML读取type属性,会让此元素所有属性都变成<Failed>
        if (hasDuplex && msData["ms-attr-value"] && !elem.scopeName && elem.type === "text") {
          log("warning!一个控件不能同时定义ms-attr-value与" + hasDuplex)
        }
        for (i = 0; binding = bindings[i]; i++) {
          type = binding.type
          if (rnoscanAttrBinding.test(type)) {
            return executeBindings(bindings.slice(0, i + 1), vmodels)
          } else if (scanNode) {
            scanNode = !rnoscanNodeBinding.test(type)
          }
        }
        executeBindings(bindings, vmodels)
      }
    }
    if (scanNode && !stopScan[elem.tagName] && rbind.test(elem.innerHTML.replace(rlt, "<").replace(rgt, ">"))) {
      mergeTextNodes && mergeTextNodes(elem)
      scanNodeList(elem, vmodels) //扫描子孙元素
    }
  }
  var rnoscanAttrBinding = /^if|widget|repeat$/
  var rnoscanNodeBinding = /^each|with|html|include$/
//IE67下，在循环绑定中，一个节点如果是通过cloneNode得到，自定义属性的specified为false，无法进入里面的分支，
//但如果我们去掉scanAttr中的attr.specified检测，一个元素会有80+个特性节点（因为它不区分固有属性与自定义属性），很容易卡死页面
  if (!W3C) {
    var attrPool = new Cache(512)
    var rattrs = /\s+(ms-[^=\s]+)(?:=("[^"]*"|'[^']*'|[^\s>]+))?/g,
        rquote = /^['"]/,
        rtag = /<\w+\b(?:(["'])[^"]*?(\1)|[^>])*>/i,
        ramp = /&amp;/g
    //IE6-8解析HTML5新标签，会将它分解两个元素节点与一个文本节点
    //<body><section>ddd</section></body>
    //        window.onload = function() {
    //            var body = document.body
    //            for (var i = 0, el; el = body.children[i++]; ) {
    //                avalon.log(el.outerHTML)
    //            }
    //        }
    //依次输出<SECTION>, </SECTION>
    var getAttributes = function (elem) {
      var html = elem.outerHTML
      //处理IE6-8解析HTML5新标签的情况，及<br>等半闭合标签outerHTML为空的情况
      if (html.slice(0, 2) === "</" || !html.trim()) {
        return []
      }
      var str = html.match(rtag)[0]
      var attributes = [],
          match,
          k, v
      var ret = attrPool.get(str)
      if (ret) {
        return ret
      }
      while (k = rattrs.exec(str)) {
        v = k[2]
        if (v) {
          v = (rquote.test(v) ? v.slice(1, -1) : v).replace(ramp, "&")
        }
        var name = k[1].toLowerCase()
        match = name.match(rmsAttr)
        var binding = {
          name: name,
          specified: true,
          value: v || ""
        }
        attributes.push(binding)
      }
      return attrPool.put(str, attributes)
    }
  }

  function scanNodeList(parent, vmodels) {
    var nodes = avalon.slice(parent.childNodes)
    scanNodeArray(nodes, vmodels)
  }

  function scanNodeArray(nodes, vmodels) {
    for (var i = 0, node; node = nodes[i++];) {
      switch (node.nodeType) {
        case 1:
          scanTag(node, vmodels) //扫描元素节点
          if (node.msCallback) {
            node.msCallback()
            node.msCallback = void 0
          }
          break
        case 3:
          if(rexpr.test(node.nodeValue)){
            scanText(node, vmodels, i) //扫描文本节点
          }
          break
      }
    }
  }


  function scanTag(elem, vmodels, node) {
    //扫描顺序  ms-skip(0) --> ms-important(1) --> ms-controller(2) --> ms-if(10) --> ms-repeat(100) 
    //--> ms-if-loop(110) --> ms-attr(970) ...--> ms-each(1400)-->ms-with(1500)--〉ms-duplex(2000)垫后
    var a = elem.getAttribute("ms-skip")
    //#360 在旧式IE中 Object标签在引入Flash等资源时,可能出现没有getAttributeNode,innerHTML的情形
    if (!elem.getAttributeNode) {
      return log("warning " + elem.tagName + " no getAttributeNode method")
    }
    var b = elem.getAttributeNode("ms-important")
    var c = elem.getAttributeNode("ms-controller")
    if (typeof a === "string") {
      return
    } else if (node = b || c) {
      var newVmodel = avalon.vmodels[node.value]
      if (!newVmodel) {
        return
      }
      //ms-important不包含父VM，ms-controller相反
      vmodels = node === b ? [newVmodel] : [newVmodel].concat(vmodels)
      var name = node.name
      elem.removeAttribute(name) //removeAttributeNode不会刷新[ms-controller]样式规则
      avalon(elem).removeClass(name)
      createSignalTower(elem, newVmodel)
    }
    scanAttr(elem, vmodels) //扫描特性节点
  }
  var rhasHtml = /\|\s*html(?:\b|$)/,
      r11a = /\|\|/g,
      rlt = /&lt;/g,
      rgt = /&gt;/g,
      rstringLiteral = /(['"])(\\\1|.)+?\1/g
  function getToken(value) {
    if (value.indexOf("|") > 0) {
      var scapegoat = value.replace(rstringLiteral, function (_) {
        return Array(_.length + 1).join("1")// jshint ignore:line
      })
      var index = scapegoat.replace(r11a, "\u1122\u3344").indexOf("|") //干掉所有短路或
      if (index > -1) {
        return {
          filters: value.slice(index),
          value: value.slice(0, index),
          expr: true
        }
      }
    }
    return {
      value: value,
      filters: "",
      expr: true
    }
  }

  function scanExpr(str) {
    var tokens = [],
        value, start = 0,
        stop
    do {
      stop = str.indexOf(openTag, start)
      if (stop === -1) {
        break
      }
      value = str.slice(start, stop)
      if (value) { // {{ 左边的文本
        tokens.push({
          value: value,
          filters: "",
          expr: false
        })
      }
      start = stop + openTag.length
      stop = str.indexOf(closeTag, start)
      if (stop === -1) {
        break
      }
      value = str.slice(start, stop)
      if (value) { //处理{{ }}插值表达式
        tokens.push(getToken(value, start))
      }
      start = stop + closeTag.length
    } while (1)
    value = str.slice(start)
    if (value) { //}} 右边的文本
      tokens.push({
        value: value,
        expr: false,
        filters: ""
      })
    }
    return tokens
  }

  function scanText(textNode, vmodels, index) {
    var bindings = []
    tokens = scanExpr(textNode.data)
    if (tokens.length) {
      for (var i = 0; token = tokens[i++]; ) {
        var node = DOC.createTextNode(token.value) //将文本转换为文本节点，并替换原来的文本节点
        if (token.expr) {
          token.value = token.value.replace(roneTime, function () {
            token.oneTime = true
            return ""
          })// jshint ignore:line
          token.type = "text"
          token.element = node
          token.filters = token.filters.replace(rhasHtml, function (a, b,c) {
            token.type = "html"
            return ""
          })// jshint ignore:line
          token.pos = index * 1000 + i
          bindings.push(token) //收集带有插值表达式的文本
        }
        avalonFragment.appendChild(node)
      }
      textNode.parentNode.replaceChild(avalonFragment, textNode)
      if (bindings.length)
        executeBindings(bindings, vmodels)
    }
  }

  var bools = ["autofocus,autoplay,async,allowTransparency,checked,controls",
    "declare,disabled,defer,defaultChecked,defaultSelected",
    "contentEditable,isMap,loop,multiple,noHref,noResize,noShade",
    "open,readOnly,selected"
  ].join(",")
  var boolMap = {}
  bools.replace(rword, function (name) {
    boolMap[name.toLowerCase()] = name
  })

  var propMap = {//属性名映射
    "accept-charset": "acceptCharset",
    "char": "ch",
    "charoff": "chOff",
    "class": "className",
    "for": "htmlFor",
    "http-equiv": "httpEquiv"
  }

  var anomaly = ["accessKey,bgColor,cellPadding,cellSpacing,codeBase,codeType,colSpan",
    "dateTime,defaultValue,frameBorder,longDesc,maxLength,marginWidth,marginHeight",
    "rowSpan,tabIndex,useMap,vSpace,valueType,vAlign"
  ].join(",")
  anomaly.replace(rword, function (name) {
    propMap[name.toLowerCase()] = name
  })

  var rnoscripts = /<noscript.*?>(?:[\s\S]+?)<\/noscript>/img
  var rnoscriptText = /<noscript.*?>([\s\S]+?)<\/noscript>/im

  var getXHR = function () {
    return new (window.XMLHttpRequest || ActiveXObject)("Microsoft.XMLHTTP") // jshint ignore:line
  }

  var templatePool = avalon.templateCache = {}

  bindingHandlers.attr = function (data, vmodels) {
    var value = stringifyExpr(data.value.trim())
    if (data.type === "include") {
      var elem = data.element
      data.includeRendered = getBindingCallback(elem, "data-include-rendered", vmodels)
      data.includeLoaded = getBindingCallback(elem, "data-include-loaded", vmodels)
      var outer = data.includeReplace = !!avalon(elem).data("includeReplace")
      if (avalon(elem).data("includeCache")) {
        data.templateCache = {}
      }
      data.startInclude = DOC.createComment("ms-include")
      data.endInclude = DOC.createComment("ms-include-end")
      if (outer) {
        data.element = data.startInclude
        elem.parentNode.insertBefore(data.startInclude, elem)
        elem.parentNode.insertBefore(data.endInclude, elem.nextSibling)
      } else {
        elem.insertBefore(data.startInclude, elem.firstChild)
        elem.appendChild(data.endInclude)
      }
    }
    data.handlerName = "attr" //handleName用于处理多种绑定共用同一种bindingExecutor的情况
    parseExprProxy(value, vmodels, data)
  }

  bindingExecutors.attr = function (val, elem, data) {
    var method = data.type,
        attrName = data.param
    if (method === "css") {
      avalon(elem).css(attrName, val)
    } else if (method === "attr") {

      // ms-attr-class="xxx" vm.xxx="aaa bbb ccc"将元素的className设置为aaa bbb ccc
      // ms-attr-class="xxx" vm.xxx=false  清空元素的所有类名
      // ms-attr-name="yyy"  vm.yyy="ooo" 为元素设置name属性
      var toRemove = (val === false) || (val === null) || (val === void 0)

      if (!W3C && propMap[attrName]) { //旧式IE下需要进行名字映射
        attrName = propMap[attrName]
      }
      var bool = boolMap[attrName]
      if (typeof elem[bool] === "boolean") {
        elem[bool] = !!val //布尔属性必须使用el.xxx = true|false方式设值
        if (!val) { //如果为false, IE全系列下相当于setAttribute(xxx,''),会影响到样式,需要进一步处理
          toRemove = true
        }
      }
      if (toRemove) {
        return elem.removeAttribute(attrName)
      }
      //SVG只能使用setAttribute(xxx, yyy), VML只能使用elem.xxx = yyy ,HTML的固有属性必须elem.xxx = yyy
      var isInnate = rsvg.test(elem) ? false : (DOC.namespaces && isVML(elem)) ? true : attrName in elem.cloneNode(false)
      if (isInnate) {
        elem[attrName] = val + ""
      } else {
        elem.setAttribute(attrName, val)
      }
    } else if (method === "include" && val) {
      var vmodels = data.vmodels
      var rendered = data.includeRendered
      var loaded = data.includeLoaded
      var replace = data.includeReplace
      var target = replace ? elem.parentNode : elem
      var scanTemplate = function (text) {
        if (loaded) {
          var newText = loaded.apply(target, [text].concat(vmodels))
          if (typeof newText === "string")
            text = newText
        }
        if (rendered) {
          checkScan(target, function () {
            rendered.call(target)
          }, NaN)
        }
        var lastID = data.includeLastID
        if (data.templateCache && lastID && lastID !== val) {
          var lastTemplate = data.templateCache[lastID]
          if (!lastTemplate) {
            lastTemplate = data.templateCache[lastID] = DOC.createElement("div")
            ifGroup.appendChild(lastTemplate)
          }
        }
        data.includeLastID = val
        while (true) {
          var node = data.startInclude.nextSibling
          if (node && node !== data.endInclude) {
            target.removeChild(node)
            if (lastTemplate)
              lastTemplate.appendChild(node)
          } else {
            break
          }
        }
        var dom = getTemplateNodes(data, val, text)
        var nodes = avalon.slice(dom.childNodes)
        target.insertBefore(dom, data.endInclude)
        scanNodeArray(nodes, vmodels)
      }

      if (data.param === "src") {
        if (typeof templatePool[val] === "string") {
          avalon.nextTick(function () {
            scanTemplate(templatePool[val])
          })
        } else if (Array.isArray(templatePool[val])) { //#805 防止在循环绑定中发出许多相同的请求
          templatePool[val].push(scanTemplate)
        } else {
          var xhr = getXHR()
          xhr.onreadystatechange = function () {
            if (xhr.readyState === 4) {
              var s = xhr.status
              if (s >= 200 && s < 300 || s === 304 || s === 1223) {
                var text = xhr.responseText
                for (var f = 0, fn; fn = templatePool[val][f++]; ) {
                  fn(text)
                }
                templatePool[val] = text
              }
            }
          }
          templatePool[val] = [scanTemplate]
          xhr.open("GET", val, true)
          if ("withCredentials" in xhr) {
            xhr.withCredentials = true
          }
          xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest")
          xhr.send(null)
        }
      } else {
        //IE系列与够新的标准浏览器支持通过ID取得元素（firefox14+）
        //http://tjvantoll.com/2012/07/19/dom-element-references-as-global-variables/
        var el = val && val.nodeType === 1 ? val : DOC.getElementById(val)
        if (el) {
          if (el.tagName === "NOSCRIPT" && !(el.innerHTML || el.fixIE78)) { //IE7-8 innerText,innerHTML都无法取得其内容，IE6能取得其innerHTML
            xhr = getXHR() //IE9-11与chrome的innerHTML会得到转义的内容，它们的innerText可以
            xhr.open("GET", location, false) //谢谢Nodejs 乱炖群 深圳-纯属虚构
            xhr.send(null)
            //http://bbs.csdn.net/topics/390349046?page=1#post-393492653
            var noscripts = DOC.getElementsByTagName("noscript")
            var array = (xhr.responseText || "").match(rnoscripts) || []
            var n = array.length
            for (var i = 0; i < n; i++) {
              var tag = noscripts[i]
              if (tag) { //IE6-8中noscript标签的innerHTML,innerText是只读的
                tag.style.display = "none" //http://haslayout.net/css/noscript-Ghost-Bug
                tag.fixIE78 = (array[i].match(rnoscriptText) || ["", "&nbsp;"])[1]
              }
            }
          }
          avalon.nextTick(function () {
            scanTemplate(el.fixIE78 || el.value || el.innerText || el.innerHTML)
          })
        }
      }
    } else {
      if (!root.hasAttribute && typeof val === "string" && (method === "src" || method === "href")) {
        val = val.replace(/&amp;/g, "&") //处理IE67自动转义的问题
      }
      elem[method] = val
      if (window.chrome && elem.tagName === "EMBED") {
        var parent = elem.parentNode //#525  chrome1-37下embed标签动态设置src不能发生请求
        var comment = document.createComment("ms-src")
        parent.replaceChild(comment, elem)
        parent.replaceChild(elem, comment)
      }
    }
  }

  function getTemplateNodes(data, id, text) {
    var div = data.templateCache && data.templateCache[id]
    if (div) {
      var dom = DOC.createDocumentFragment(),
          firstChild
      while (firstChild = div.firstChild) {
        dom.appendChild(firstChild)
      }
      return dom
    }
    return avalon.parseHTML(text)
  }

//这几个指令都可以使用插值表达式，如ms-src="aaa/{{b}}/{{c}}.html"
  "title,alt,src,value,css,include,href".replace(rword, function (name) {
    bindingHandlers[name] = bindingHandlers.attr
  })
//根据VM的属性值或表达式的值切换类名，ms-class="xxx yyy zzz:flag" 
//http://www.cnblogs.com/rubylouvre/archive/2012/12/17/2818540.html
  bindingHandlers["class"] = function (binding, vmodels) {
    var oldStyle = binding.param,
        text = binding.value,
        rightExpr
    binding.handlerName = "class"
    if (!oldStyle || isFinite(oldStyle)) {
      binding.param = "" //去掉数字
      var colonIndex = text.replace(rexprg, function (a) {
        return a.replace(/./g, "0")
      }).indexOf(":") //取得第一个冒号的位置
      if (colonIndex === -1) { // 比如 ms-class="aaa bbb ccc" 的情况
        var className = text
        rightExpr = true
      } else { // 比如 ms-class-1="ui-state-active:checked" 的情况
        className = text.slice(0, colonIndex)
        rightExpr = text.slice(colonIndex + 1)
      }
      if (!rexpr.test(text)) {
        className = quote(className)
      } else {
        className = stringifyExpr(className)
      }
      binding.expr = "[" + className + "," + rightExpr + "]"
    } else {
      binding.expr = '[' + quote(oldStyle) + "," + text + "]"
      binding.oldStyle = oldStyle
    }
    var method = binding.type
    if (method === "hover" || method === "active") { //确保只绑定一次
      if (!binding.hasBindEvent) {
        var elem = binding.element
        var $elem = avalon(elem)
        var activate = "mouseenter" //在移出移入时切换类名
        var abandon = "mouseleave"
        if (method === "active") { //在聚焦失焦中切换类名
          elem.tabIndex = elem.tabIndex || -1
          activate = "mousedown"
          abandon = "mouseup"
          var fn0 = $elem.bind("mouseleave", function () {
            binding.toggleClass && $elem.removeClass(binding.newClass)
          })
        }
      }

      var fn1 = $elem.bind(activate, function () {
        binding.toggleClass && $elem.addClass(binding.newClass)
      })
      var fn2 = $elem.bind(abandon, function () {
        binding.toggleClass && $elem.removeClass(binding.newClass)
      })
      binding.rollback = function () {
        $elem.unbind("mouseleave", fn0)
        $elem.unbind(activate, fn1)
        $elem.unbind(abandon, fn2)
      }
      binding.hasBindEvent = true
    }
    parseExprProxy(binding.expr, vmodels, binding)
  }

  bindingExecutors["class"] = function (arr, elem, binding) {
    var $elem = avalon(elem)
    binding.newClass = arr[0]
    binding.toggleClass = !!arr[1]
    if (binding.oldClass && binding.newClass !== binding.oldClass) {
      $elem.removeClass(binding.oldClass)
    }
    binding.oldClass = binding.newClass
    if (binding.type === "class") {
      if (binding.oldStyle) {
        $elem.toggleClass(binding.oldStyle, !!arr[1])
      } else {
        $elem.toggleClass(binding.newClass, binding.toggleClass)
      }
    }

  }

  "hover,active".replace(rword, function (method) {
    bindingHandlers[method] = bindingHandlers["class"]
  })
//ms-controller绑定已经在scanTag 方法中实现
//ms-css绑定已由ms-attr绑定实现


// bindingHandlers.data 定义在if.js
  bindingExecutors.data = function(val, elem, data) {
    var key = "data-" + data.param
    if (val && typeof val === "object") {
      elem[key] = val
    } else {
      elem.setAttribute(key, String(val))
    }
  }
//双工绑定
  var duplexBinding = bindingHandlers.duplex = function(data, vmodels) {
    var elem = data.element,
        hasCast
    parseExprProxy(data.value, vmodels, data, 1)

    data.changed = getBindingCallback(elem, "data-duplex-changed", vmodels) || noop
    if (data.evaluator && data.args) {
      var params = []
      var casting = oneObject("string,number,boolean,checked")
      if (elem.type === "radio" && data.param === "") {
        data.param = "checked"
      }
      if (elem.msData) {
        elem.msData["ms-duplex"] = data.value
      }
      data.param.replace(/\w+/g, function(name) {
        if (/^(checkbox|radio)$/.test(elem.type) && /^(radio|checked)$/.test(name)) {
          if (name === "radio")
            log("ms-duplex-radio已经更名为ms-duplex-checked")
          name = "checked"
          data.isChecked = true
        }
        if (name === "bool") {
          name = "boolean"
          log("ms-duplex-bool已经更名为ms-duplex-boolean")
        } else if (name === "text") {
          name = "string"
          log("ms-duplex-text已经更名为ms-duplex-string")
        }
        if (casting[name]) {
          hasCast = true
        }
        avalon.Array.ensure(params, name)
      })
      if (!hasCast) {
        params.push("string")
      }
      data.param = params.join("-")
      data.bound = function(type, callback) {
        if (elem.addEventListener) {
          elem.addEventListener(type, callback, false)
        } else {
          elem.attachEvent("on" + type, callback)
        }
        var old = data.rollback
        data.rollback = function() {
          elem.avalonSetter = null
          avalon.unbind(elem, type, callback)
          old && old()
        }
      }
      for (var i in avalon.vmodels) {
        var v = avalon.vmodels[i]
        v.$fire("avalon-ms-duplex-init", data)
      }
      var cpipe = data.pipe || (data.pipe = pipe)
      cpipe(null, data, "init")
      var tagName = elem.tagName
      duplexBinding[tagName] && duplexBinding[tagName](elem, data.evaluator.apply(null, data.args), data)
    }
  }
//不存在 bindingExecutors.duplex

  function fixNull(val) {
    return val == null ? "" : val
  }
  avalon.duplexHooks = {
    checked: {
      get: function(val, data) {
        return !data.element.oldValue
      }
    },
    string: {
      get: function(val) { //同步到VM
        return val
      },
      set: fixNull
    },
    "boolean": {
      get: function(val) {
        return val === "true"
      },
      set: fixNull
    },
    number: {
      get: function(val, data) {
        var number = parseFloat(val)
        if (-val === -number) {
          return number
        }
        var arr = /strong|medium|weak/.exec(data.element.getAttribute("data-duplex-number")) || ["medium"]
        switch (arr[0]) {
          case "strong":
            return 0
          case "medium":
            return val === "" ? "" : 0
          case "weak":
            return val
        }
      },
      set: fixNull
    }
  }

  function pipe(val, data, action, e) {
    data.param.replace(/\w+/g, function(name) {
      var hook = avalon.duplexHooks[name]
      if (hook && typeof hook[action] === "function") {
        val = hook[action](val, data)
      }
    })
    return val
  }

  var TimerID, ribbon = []

  avalon.tick = function(fn) {
    if (ribbon.push(fn) === 1) {
      TimerID = setInterval(ticker, 60)
    }
  }

  function ticker() {
    for (var n = ribbon.length - 1; n >= 0; n--) {
      var el = ribbon[n]
      if (el() === false) {
        ribbon.splice(n, 1)
      }
    }
    if (!ribbon.length) {
      clearInterval(TimerID)
    }
  }

  var watchValueInTimer = noop
  var rmsinput = /text|password|hidden/
  new function() { // jshint ignore:line
    try { //#272 IE9-IE11, firefox
      var setters = {}
      var aproto = HTMLInputElement.prototype
      var bproto = HTMLTextAreaElement.prototype
      function newSetter(value) { // jshint ignore:line
        setters[this.tagName].call(this, value)
        if (rmsinput.test(this.type) && !this.msFocus && this.avalonSetter) {
          this.avalonSetter()
        }
      }
      var inputProto = HTMLInputElement.prototype
      Object.getOwnPropertyNames(inputProto) //故意引发IE6-8等浏览器报错
      setters["INPUT"] = Object.getOwnPropertyDescriptor(aproto, "value").set

      Object.defineProperty(aproto, "value", {
        set: newSetter
      })
      setters["TEXTAREA"] = Object.getOwnPropertyDescriptor(bproto, "value").set
      Object.defineProperty(bproto, "value", {
        set: newSetter
      })
    } catch (e) {
      //在chrome 43中 ms-duplex终于不需要使用定时器实现双向绑定了
      // http://updates.html5rocks.com/2015/04/DOM-attributes-now-on-the-prototype
      // https://docs.google.com/document/d/1jwA8mtClwxI-QJuHT7872Z0pxpZz8PBkf2bGAbsUtqs/edit?pli=1
      watchValueInTimer = avalon.tick
    }
  } // jshint ignore:line
  if (IEVersion) {
    avalon.bind(DOC, "selectionchange", function(e) {
      var el = DOC.activeElement
      if (el && typeof el.avalonSetter === "function") {
        el.avalonSetter()
      }
    })
  }

//处理radio, checkbox, text, textarea, password
  duplexBinding.INPUT = function(element, evaluator, data) {
    var $type = element.type,
        bound = data.bound,
        $elem = avalon(element),
        composing = false

    function callback(value) {
      data.changed.call(this, value, data)
    }

    function compositionStart() {
      composing = true
    }

    function compositionEnd() {
      composing = false
    }
    //当value变化时改变model的值
    var updateVModel = function() {
      var val = element.value //防止递归调用形成死循环
      if (composing || val === element.oldValue) //处理中文输入法在minlengh下引发的BUG
        return
      var lastValue = data.pipe(val, data, "get")
      if ($elem.data("duplexObserve") !== false) {
        evaluator(lastValue)
        callback.call(element, lastValue)
      }
    }
    //当model变化时,它就会改变value的值
    data.handler = function() {
      var val = data.pipe(evaluator(), data, "set") +"" //fix #673
      if (val !== element.oldValue) {
        element.value = element.oldValue = val
      }
    }
    if (data.isChecked || $type === "radio") {
      var IE6 = IEVersion === 6
      updateVModel = function() {
        if ($elem.data("duplexObserve") !== false) {
          var lastValue = data.pipe(element.value, data, "get")
          evaluator(lastValue)
          callback.call(element, lastValue)
        }
      }
      data.handler = function() {
        var val = evaluator()
        var checked = data.isChecked ? !! val : val + "" === element.value
        element.oldValue = checked
        if (IE6) {
          setTimeout(function() {
            //IE8 checkbox, radio是使用defaultChecked控制选中状态，
            //并且要先设置defaultChecked后设置checked
            //并且必须设置延迟
            element.defaultChecked = checked
            element.checked = checked
          }, 31)
        } else {
          element.checked = checked
        }
      }
      bound("click", updateVModel)
    } else if ($type === "checkbox") {
      updateVModel = function() {
        if ($elem.data("duplexObserve") !== false) {
          var method = element.checked ? "ensure" : "remove"
          var array = evaluator()
          if (!Array.isArray(array)) {
            log("ms-duplex应用于checkbox上要对应一个数组")
            array = [array]
          }
          var val = data.pipe(element.value, data, "get")
          avalon.Array[method](array, val)
          callback.call(element, array)
        }
      }

      data.handler = function() {
        var array = [].concat(evaluator()) //强制转换为数组
        var val = data.pipe(element.value, data, "get")
        element.checked = array.indexOf(val) > -1
      }
      bound(W3C ? "change" : "click", updateVModel)
    } else {
      var events = element.getAttribute("data-duplex-event") || "input"
      if (element.attributes["data-event"]) {
        log("data-event指令已经废弃，请改用data-duplex-event")
      }

      function delay(e) { // jshint ignore:line
        setTimeout(function() {
          updateVModel(e)
        })
      }
      events.replace(rword, function(name) {
        switch (name) {
          case "input":
            if (!IEVersion) { // W3C
              bound("input", updateVModel)
              //非IE浏览器才用这个
              bound("compositionstart", compositionStart)
              bound("compositionend", compositionEnd)
              bound("DOMAutoComplete", updateVModel)
            } else { //onpropertychange事件无法区分是程序触发还是用户触发
              // IE下通过selectionchange事件监听IE9+点击input右边的X的清空行为，及粘贴，剪切，删除行为
              if (IEVersion > 8) {
                bound("input", updateVModel) //IE9使用propertychange无法监听中文输入改动
              } else {
                bound("propertychange", function(e) { //IE6-8下第一次修改时不会触发,需要使用keydown或selectionchange修正
                  if (e.propertyName === "value") {
                    updateVModel()
                  }
                })
              }
              bound("dragend", delay)
              //http://www.cnblogs.com/rubylouvre/archive/2013/02/17/2914604.html
              //http://www.matts411.com/post/internet-explorer-9-oninput/
            }
            break
          default:
            bound(name, updateVModel)
            break
        }
      })
      bound("focus", function() {
        element.msFocus = true
      })
      bound("blur", function() {
        element.msFocus = false
      })

      if (rmsinput.test($type)) {
        watchValueInTimer(function() {
          if (root.contains(element)) {
            if (!element.msFocus && element.oldValue !== element.value) {
              updateVModel()
            }
          } else if (!element.msRetain) {
            return false
          }
        })
      }

      element.avalonSetter = updateVModel //#765
    }

    element.oldValue = element.value
    avalon.injectBinding(data)
    callback.call(element, element.value)
  }
  duplexBinding.TEXTAREA = duplexBinding.INPUT
  duplexBinding.SELECT = function(element, evaluator, data) {
    var $elem = avalon(element)

    function updateVModel() {
      if ($elem.data("duplexObserve") !== false) {
        var val = $elem.val() //字符串或字符串数组
        if (Array.isArray(val)) {
          val = val.map(function(v) {
            return data.pipe(v, data, "get")
          })
        } else {
          val = data.pipe(val, data, "get")
        }
        if (val + "" !== element.oldValue) {
          evaluator(val)
        }
        data.changed.call(element, val, data)
      }
    }
    data.handler = function() {
      var val = evaluator()
      val = val && val.$model || val
      if (Array.isArray(val)) {
        if (!element.multiple) {
          log("ms-duplex在<select multiple=true>上要求对应一个数组")
        }
      } else {
        if (element.multiple) {
          log("ms-duplex在<select multiple=false>不能对应一个数组")
        }
      }
      //必须变成字符串后才能比较
      val = Array.isArray(val) ? val.map(String) : val + ""
      if (val + "" !== element.oldValue) {
        $elem.val(val)
        element.oldValue = val + ""
      }
    }
    data.bound("change", updateVModel)
    element.msCallback = function() {
      avalon.injectBinding(data)
      data.changed.call(element, evaluator(), data)
    }
  }
// bindingHandlers.html 定义在if.js
  bindingExecutors.html = function (val, elem, data) {
    var isHtmlFilter = elem.nodeType !== 1
    var parent = isHtmlFilter ? elem.parentNode : elem
    if (!parent)
      return
    val = val == null ? "" : val
    if (data.oldText !== val) {
      data.oldText = val
    } else {
      return
    }
    if (elem.nodeType === 3) {
      var signature = generateID("html")
      parent.insertBefore(DOC.createComment(signature), elem)
      data.element = DOC.createComment(signature + ":end")
      parent.replaceChild(data.element, elem)
      elem = data.element
    }
    if (typeof val !== "object") {//string, number, boolean
      var fragment = avalon.parseHTML(String(val))
    } else if (val.nodeType === 11) { //将val转换为文档碎片
      fragment = val
    } else if (val.nodeType === 1 || val.item) {
      var nodes = val.nodeType === 1 ? val.childNodes : val.item
      fragment = avalonFragment.cloneNode(true)
      while (nodes[0]) {
        fragment.appendChild(nodes[0])
      }
    }

    nodes = avalon.slice(fragment.childNodes)
    //插入占位符, 如果是过滤器,需要有节制地移除指定的数量,如果是html指令,直接清空
    if (isHtmlFilter) {
      var endValue = elem.nodeValue.slice(0, -4)
      while (true) {
        var node = elem.previousSibling
        if (!node || node.nodeType === 8 && node.nodeValue === endValue) {
          break
        } else {
          parent.removeChild(node)
        }
      }
      parent.insertBefore(fragment, elem)
    } else {
      avalon.clearHTML(elem).appendChild(fragment)
    }
    scanNodeArray(nodes, data.vmodels)
  }
  bindingHandlers["if"] =
      bindingHandlers.data =
          bindingHandlers.text =
              bindingHandlers.html =
                  function(data, vmodels) {
                    parseExprProxy(data.value, vmodels, data)
                  }

  bindingExecutors["if"] = function(val, elem, data) {
    try {
      if(!elem.parentNode) return
    } catch(e) {return}
    if (val) { //插回DOM树
      if (elem.nodeType === 8) {
        elem.parentNode.replaceChild(data.template, elem)
        elem.ifRemove = null
        //   animate.enter(data.template, elem.parentNode)
        elem = data.element = data.template //这时可能为null
      }
      if (elem.getAttribute(data.name)) {
        elem.removeAttribute(data.name)
        scanAttr(elem, data.vmodels)
      }
      data.rollback = null
    } else { //移出DOM树，并用注释节点占据原位置
      if (elem.nodeType === 1) {
        var node = data.element = DOC.createComment("ms-if")
        elem.parentNode.replaceChild(node, elem)
        elem.ifRemove = node
        //     animate.leave(elem, node.parentNode, node)
        data.template = elem //元素节点
        ifGroup.appendChild(elem)
        data.rollback = function() {
          if (elem.parentNode === ifGroup) {
            ifGroup.removeChild(elem)
          }
        }
      }
    }
  }
//ms-important绑定已经在scanTag 方法中实现
//ms-include绑定已由ms-attr绑定实现

  var rdash = /\(([^)]*)\)/
  bindingHandlers.on = function(data, vmodels) {
    var value = data.value
    data.type = "on"
    var eventType = data.param.replace(/-\d+$/, "") // ms-on-mousemove-10
    if (typeof bindingHandlers.on[eventType + "Hook"] === "function") {
      bindingHandlers.on[eventType + "Hook"](data)
    }
    if (value.indexOf("(") > 0 && value.indexOf(")") > -1) {
      var matched = (value.match(rdash) || ["", ""])[1].trim()
      if (matched === "" || matched === "$event") { // aaa() aaa($event)当成aaa处理
        value = value.replace(rdash, "")
      }
    }
    parseExprProxy(value, vmodels, data)
  }

  bindingExecutors.on = function(callback, elem, data) {
    callback = function(e) {
      var fn = data.evaluator || noop
      return fn.apply(this, data.args.concat(e))
    }
    var eventType = data.param.replace(/-\d+$/, "") // ms-on-mousemove-10
    if (eventType === "scan") {
      callback.call(elem, {
        type: eventType
      })
    } else if (typeof data.specialBind === "function") {
      data.specialBind(elem, callback)
    } else {
      var removeFn = avalon.bind(elem, eventType, callback)
    }
    data.rollback = function() {
      if (typeof data.specialUnbind === "function") {
        data.specialUnbind()
      } else {
        avalon.unbind(elem, eventType, removeFn)
      }
    }
  }
  bindingHandlers.repeat = function (data, vmodels) {
    var type = data.type
    parseExprProxy(data.value, vmodels, data, 1)
    data.proxies = []
    var freturn = false
    try {
      var $repeat = data.$repeat = data.evaluator.apply(0, data.args || [])
      var xtype = avalon.type($repeat)
      if (xtype !== "object" && xtype !== "array") {
        freturn = true
        avalon.log("warning:" + data.value + "只能是对象或数组")
      } else {
        data.xtype = xtype
      }
    } catch (e) {
      freturn = true
    }
    var arr = data.value.split(".") || []
    if (arr.length > 1) {
      arr.pop()
      var n = arr[0]
      for (var i = 0, v; v = vmodels[i++]; ) {
        if (v && v.hasOwnProperty(n)) {
          var events = v[n].$events || {}
          events[subscribers] = events[subscribers] || []
          events[subscribers].push(data)
          break
        }
      }
    }

    var elem = data.element
    if (elem.nodeType === 1) {
      elem.removeAttribute(data.name)
      data.sortedCallback = getBindingCallback(elem, "data-with-sorted", vmodels)
      data.renderedCallback = getBindingCallback(elem, "data-" + type + "-rendered", vmodels)
      var signature = generateID(type)
      var start = DOC.createComment(signature)
      var end = DOC.createComment(signature + ":end")
      data.signature = signature
      data.template = avalonFragment.cloneNode(false)
      if (type === "repeat") {
        var parent = elem.parentNode
        parent.replaceChild(end, elem)
        parent.insertBefore(start, end)
        data.template.appendChild(elem)
      } else {
        while (elem.firstChild) {
          data.template.appendChild(elem.firstChild)
        }
        elem.appendChild(start)
        elem.appendChild(end)
      }
      data.element = end
      data.handler = bindingExecutors.repeat
      data.rollback = function () {
        var elem = data.element
        if (!elem)
          return
        data.handler("clear")
      }
    }

    if (freturn) {
      return
    }

    data.$outer = {}
    var check0 = "$key"
    var check1 = "$val"
    if (Array.isArray($repeat)) {
      check0 = "$first"
      check1 = "$last"
    }

    for (i = 0; v = vmodels[i++]; ) {
      if (v.hasOwnProperty(check0) && v.hasOwnProperty(check1)) {
        data.$outer = v
        break
      }
    }
    var $events = $repeat.$events
    var $list = ($events || {})[subscribers]
    injectDependency($list, data)
    if (xtype === "object") {
      data.handler("append")
    } else if ($repeat.length) {
      data.handler("add", 0, $repeat.length)
    }
  }

  bindingExecutors.repeat = function (method, pos, el) {
    var data = this
    if (!method && data.xtype) {
      var old = data.$repeat
      var neo = data.evaluator.apply(0, data.args || [])

      if (data.xtype === "array") {
        if (old.length === neo.length) {
          return
        }
        method = "add"
        pos = 0
        data.$repeat = neo
        el = neo.length
      } else {
        if (keysVM(old).join(";;") === keysVM(neo).join(";;")) {
          return
        }
        method = "append"
        data.$repeat = neo
      }
    }
    if (method) {
      var start, fragment
      var end = data.element
      var comments = getComments(data)
      var parent = end.parentNode
      var proxies = data.proxies
      var transation = avalonFragment.cloneNode(false)
      switch (method) {
        case "add": //在pos位置后添加el数组（pos为插入位置,el为要插入的个数）
          var n = pos + el
          var fragments = []
          for (var i = pos; i < n; i++) {
            var proxy = eachProxyAgent(i, data)
            proxies.splice(i, 0, proxy)
            shimController(data, transation, proxy, fragments)
          }
          parent.insertBefore(transation, comments[pos] || end)
          for (i = 0; fragment = fragments[i++]; ) {
            scanNodeArray(fragment.nodes, fragment.vmodels)
            fragment.nodes = fragment.vmodels = null
          }

          break
        case "del": //将pos后的el个元素删掉(pos, el都是数字)
          sweepNodes(comments[pos], comments[pos + el] || end)
          var removed = proxies.splice(pos, el)
          recycleProxies(removed, "each")
          break
        case "clear":
          start = comments[0]
          if (start) {
            sweepNodes(start, end)
            if (data.xtype === "object") {
              parent.insertBefore(start, end)
            }else{
              recycleProxies(proxies, "each")
            }
          }
          break
        case "move":
          start = comments[0]
          if (start) {
            var signature = start.nodeValue
            var rooms = []
            var room = [],
                node
            sweepNodes(start, end, function () {
              room.unshift(this)
              if (this.nodeValue === signature) {
                rooms.unshift(room)
                room = []
              }
            })
            sortByIndex(rooms, pos)
            sortByIndex(proxies, pos)
            while (room = rooms.shift()) {
              while (node = room.shift()) {
                transation.appendChild(node)
              }
            }
            parent.insertBefore(transation, end)
          }
          break
        case "index": //将proxies中的第pos个起的所有元素重新索引
          var last = proxies.length - 1
          for (; el = proxies[pos]; pos++) {
            el.$index = pos
            el.$first = pos === 0
            el.$last = pos === last
          }
          return
        case "set": //将proxies中的第pos个元素的VM设置为el（pos为数字，el任意）
          proxy = proxies[pos]
          if (proxy) {
            fireDependencies(proxy.$events[data.param || "el"])
          }
          break
        case "append":
          var object = data.$repeat //原来第2参数， 被循环对象
          var pool = Array.isArray(proxies) ||!proxies ?  {}: proxies   //代理对象组成的hash
          data.proxies = pool
          var keys = []
          fragments = []
          for (var key in pool) {
            if (!object.hasOwnProperty(key)) {
              proxyRecycler(pool[key], withProxyPool) //去掉之前的代理VM
              delete(pool[key])
            }
          }
          for (key in object) { //得到所有键名
            if (object.hasOwnProperty(key) && key !== "hasOwnProperty") {
              keys.push(key)
            }
          }
          if (data.sortedCallback) { //如果有回调，则让它们排序
            var keys2 = data.sortedCallback.call(parent, keys)
            if (keys2 && Array.isArray(keys2) && keys2.length) {
              keys = keys2
            }
          }
          for (i = 0; key = keys[i++]; ) {
            if (key !== "hasOwnProperty") {
              pool[key] = withProxyAgent(pool[key], key, data)
              shimController(data, transation, pool[key], fragments)
            }
          }

          parent.insertBefore(transation, end)
          for (i = 0; fragment = fragments[i++]; ) {
            scanNodeArray(fragment.nodes, fragment.vmodels)
            fragment.nodes = fragment.vmodels = null
          }
          break
      }
      if (!data.$repeat || data.$repeat.hasOwnProperty("$lock")) //IE6-8 VBScript对象会报错, 有时候data.$repeat不存在
        return
      if (method === "clear")
        method = "del"
      var callback = data.renderedCallback || noop,
          args = arguments
      if (parent.oldValue && parent.tagName === "SELECT") { //fix #503
        avalon(parent).val(parent.oldValue.split(","))
      }
      callback.apply(parent, args)
    }
  }
  "with,each".replace(rword, function (name) {
    bindingHandlers[name] = bindingHandlers.repeat
  })

  function shimController(data, transation, proxy, fragments) {
    var content = data.template.cloneNode(true)
    var nodes = avalon.slice(content.childNodes)
    content.insertBefore(DOC.createComment(data.signature), content.firstChild)
    transation.appendChild(content)
    var nv = [proxy].concat(data.vmodels)
    var fragment = {
      nodes: nodes,
      vmodels: nv
    }
    fragments.push(fragment)
  }

  function getComments(data) {
    var ret = []
    var nodes = data.element.parentNode.childNodes
    for (var i = 0, node; node = nodes[i++]; ) {
      if (node.nodeValue === data.signature) {
        ret.push(node)
      } else if (node.nodeValue === data.signature + ":end") {
        break
      }
    }
    return ret
  }


//移除掉start与end之间的节点(保留end)
  function sweepNodes(start, end, callback) {
    while (true) {
      var node = end.previousSibling
      if (!node)
        break
      node.parentNode.removeChild(node)
      callback && callback.call(node)
      if (node === start) {
        break
      }
    }
  }

// 为ms-each,ms-with, ms-repeat会创建一个代理VM，
// 通过它们保持一个下上文，让用户能调用$index,$first,$last,$remove,$key,$val,$outer等属性与方法
// 所有代理VM的产生,消费,收集,存放通过xxxProxyFactory,xxxProxyAgent, recycleProxies,xxxProxyPool实现
  var withProxyPool = []
  function withProxyFactory() {
    var proxy = modelFactory({
      $key: "",
      $outer: {},
      $host: {},
      $val: {
        get: function () {
          return this.$host[this.$key]
        },
        set: function (val) {
          this.$host[this.$key] = val
        }
      }
    }, {
      $val: 1
    })
    proxy.$id = generateID("$proxy$with")
    return proxy
  }

  function withProxyAgent(proxy, key, data) {
    proxy = proxy || withProxyPool.pop()
    if (!proxy) {
      proxy = withProxyFactory()
    } else {
      proxy.$reinitialize()
    }
    var host = data.$repeat
    proxy.$key = key

    proxy.$host = host
    proxy.$outer = data.$outer
    if (host.$events) {
      proxy.$events.$val = host.$events[key]
    } else {
      proxy.$events = {}
    }
    return proxy
  }


  function  recycleProxies(proxies) {
    eachProxyRecycler(proxies)
  }
  function eachProxyRecycler(proxies) {
    proxies.forEach(function (proxy) {
      proxyRecycler(proxy, eachProxyPool)
    })
    proxies.length = 0
  }


  var eachProxyPool = []
  function eachProxyFactory(name) {
    var source = {
      $host: [],
      $outer: {},
      $index: 0,
      $first: false,
      $last: false,
      $remove: avalon.noop
    }
    source[name] = {
      get: function () {
        var e = this.$events
        var array = e.$index
        e.$index = e[name] //#817 通过$index为el收集依赖
        try {
          return this.$host[this.$index]
        } finally {
          e.$index = array
        }
      },
      set: function (val) {
        try {
          var e = this.$events
          var array = e.$index
          e.$index = []
          this.$host.set(this.$index, val)
        } finally {
          e.$index = array
        }
      }
    }
    var second = {
      $last: 1,
      $first: 1,
      $index: 1
    }
    var proxy = modelFactory(source, second)
    proxy.$id = generateID("$proxy$each")
    return proxy
  }

  function eachProxyAgent(index, data) {
    var param = data.param || "el",
        proxy
    for (var i = 0, n = eachProxyPool.length; i < n; i++) {
      var candidate = eachProxyPool[i]
      if (candidate && candidate.hasOwnProperty(param)) {
        proxy = candidate
        eachProxyPool.splice(i, 1)
      }
    }
    if (!proxy) {
      proxy = eachProxyFactory(param)
    }
    var host = data.$repeat
    var last = host.length - 1
    proxy.$index = index
    proxy.$first = index === 0
    proxy.$last = index === last
    proxy.$host = host
    proxy.$outer = data.$outer
    proxy.$remove = function () {
      return host.removeAt(proxy.$index)
    }
    return proxy
  }


  function proxyRecycler(proxy, proxyPool) {
    for (var i in proxy.$events) {
      var arr = proxy.$events[i]
      if (Array.isArray(arr)) {
        arr.forEach(function (data) {
          if (typeof data === "object")
            disposeData(data)
        })// jshint ignore:line
        arr.length = 0
      }
    }
    proxy.$host = proxy.$outer = {}
    if (proxyPool.unshift(proxy) > kernel.maxRepeatSize) {
      proxyPool.pop()
    }
  }

  /*********************************************************************
   *                         各种指令                                  *
   **********************************************************************/
//ms-skip绑定已经在scanTag 方法中实现
// bindingHandlers.text 定义在if.js
  bindingExecutors.text = function(val, elem) {
    val = val == null ? "" : val //不在页面上显示undefined null
    if (elem.nodeType === 3) { //绑定在文本节点上
      try { //IE对游离于DOM树外的节点赋值会报错
        elem.data = val
      } catch (e) {}
    } else { //绑定在特性节点上
      if ("textContent" in elem) {
        elem.textContent = val
      } else {
        elem.innerText = val
      }
    }
  }
  function parseDisplay(nodeName, val) {
    //用于取得此类标签的默认display值
    var key = "_" + nodeName
    if (!parseDisplay[key]) {
      var node = DOC.createElement(nodeName)
      root.appendChild(node)
      if (W3C) {
        val = getComputedStyle(node, null).display
      } else {
        val = node.currentStyle.display
      }
      root.removeChild(node)
      parseDisplay[key] = val
    }
    return parseDisplay[key]
  }

  avalon.parseDisplay = parseDisplay

  bindingHandlers.visible = function (data, vmodels) {
    parseExprProxy(data.value, vmodels, data)
  }

  bindingExecutors.visible = function (val, elem, binding) {
    if (val) {
      elem.style.display = binding.display || ""
      if (avalon(elem).css("display") === "none") {
        elem.style.display = binding.display = parseDisplay(elem.nodeName)
      }
    } else {
      elem.style.display = "none"
    }
  }
  bindingHandlers.widget = function(data, vmodels) {
    var args = data.value.match(rword)
    var elem = data.element
    var widget = args[0]
    var id = args[1]
    if (!id || id === "$") { //没有定义或为$时，取组件名+随机数
      id = generateID(widget)
    }
    var optName = args[2] || widget //没有定义，取组件名
    var constructor = avalon.ui[widget]
    if (typeof constructor === "function") { //ms-widget="tabs,tabsAAA,optname"
      vmodels = elem.vmodels || vmodels
      for (var i = 0, v; v = vmodels[i++];) {
        if (v.hasOwnProperty(optName) && typeof v[optName] === "object") {
          var vmOptions = v[optName]
          vmOptions = vmOptions.$model || vmOptions
          break
        }
      }
      if (vmOptions) {
        var wid = vmOptions[widget + "Id"]
        if (typeof wid === "string") {
          log("warning!不再支持" + widget + "Id")
          id = wid
        }
      }
      //抽取data-tooltip-text、data-tooltip-attr属性，组成一个配置对象
      var widgetData = avalon.getWidgetData(elem, widget)
      data.value = [widget, id, optName].join(",")
      data[widget + "Id"] = id
      data.evaluator = noop
      elem.msData["ms-widget-id"] = id
      var options = data[widget + "Options"] = avalon.mix({}, constructor.defaults, vmOptions || {}, widgetData)
      elem.removeAttribute("ms-widget")
      var vmodel = constructor(elem, data, vmodels) || {} //防止组件不返回VM
      if (vmodel.$id) {
        avalon.vmodels[id] = vmodel
        createSignalTower(elem, vmodel)
        try {
          vmodel.$init(function() {
            avalon.scan(elem, [vmodel].concat(vmodels))
            if (typeof options.onInit === "function") {
              options.onInit.call(elem, vmodel, options, vmodels)
            }
          })
        } catch (e) {}
        data.rollback = function() {
          try {
            vmodel.$remove()
            vmodel.widgetElement = null // 放到$remove后边
          } catch (e) {}
          elem.msData = {}
          delete avalon.vmodels[vmodel.$id]
        }
        injectDisposeQueue(data, widgetList)
        if (window.chrome) {
          elem.addEventListener("DOMNodeRemovedFromDocument", function() {
            setTimeout(rejectDisposeQueue)
          })
        }
      } else {
        avalon.scan(elem, vmodels)
      }
    } else if (vmodels.length) { //如果该组件还没有加载，那么保存当前的vmodels
      elem.vmodels = vmodels
    }
  }
  var widgetList = []
//不存在 bindingExecutors.widget
  /*********************************************************************
   *                             自带过滤器                            *
   **********************************************************************/
  var rscripts = /<script[^>]*>([\S\s]*?)<\/script\s*>/gim
  var ron = /\s+(on[^=\s]+)(?:=("[^"]*"|'[^']*'|[^\s>]+))?/g
  var ropen = /<\w+\b(?:(["'])[^"]*?(\1)|[^>])*>/ig
  var rsanitize = {
    a: /\b(href)\=("javascript[^"]*"|'javascript[^']*')/ig,
    img: /\b(src)\=("javascript[^"]*"|'javascript[^']*')/ig,
    form: /\b(action)\=("javascript[^"]*"|'javascript[^']*')/ig
  }
  var rsurrogate = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g
  var rnoalphanumeric = /([^\#-~| |!])/g;

  function numberFormat(number, decimals, point, thousands) {
    //form http://phpjs.org/functions/number_format/
    //number	必需，要格式化的数字
    //decimals	可选，规定多少个小数位。
    //point	可选，规定用作小数点的字符串（默认为 . ）。
    //thousands	可选，规定用作千位分隔符的字符串（默认为 , ），如果设置了该参数，那么所有其他参数都是必需的。
    number = (number + '')
        .replace(/[^0-9+\-Ee.]/g, '')
    var n = !isFinite(+number) ? 0 : +number,
        prec = !isFinite(+decimals) ? 3 : Math.abs(decimals),
        sep = thousands || ",",
        dec = point || ".",
        s = '',
        toFixedFix = function(n, prec) {
          var k = Math.pow(10, prec)
          return '' + (Math.round(n * k) / k)
                  .toFixed(prec)
        }
    // Fix for IE parseFloat(0.55).toFixed(0) = 0;
    s = (prec ? toFixedFix(n, prec) : '' + Math.round(n))
        .split('.')
    if (s[0].length > 3) {
      s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep)
    }
    if ((s[1] || '')
            .length < prec) {
      s[1] = s[1] || ''
      s[1] += new Array(prec - s[1].length + 1)
          .join('0')
    }
    return s.join(dec)
  }


  var filters = avalon.filters = {
    uppercase: function(str) {
      return str.toUpperCase()
    },
    lowercase: function(str) {
      return str.toLowerCase()
    },
    truncate: function(str, length, truncation) {
      //length，新字符串长度，truncation，新字符串的结尾的字段,返回新字符串
      length = length || 30
      truncation = typeof truncation === "string" ?  truncation : "..."
      return str.length > length ? str.slice(0, length - truncation.length) + truncation : String(str)
    },
    $filter: function(val) {
      for (var i = 1, n = arguments.length; i < n; i++) {
        var array = arguments[i]
        var fn = avalon.filters[array[0]]
        if (typeof fn === "function") {
          var arr = [val].concat(array.slice(1))
          val = fn.apply(null, arr)
        }
      }
      return val
    },
    camelize: camelize,
    //https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet
    //    <a href="javasc&NewLine;ript&colon;alert('XSS')">chrome</a> 
    //    <a href="data:text/html;base64, PGltZyBzcmM9eCBvbmVycm9yPWFsZXJ0KDEpPg==">chrome</a>
    //    <a href="jav	ascript:alert('XSS');">IE67chrome</a>
    //    <a href="jav&#x09;ascript:alert('XSS');">IE67chrome</a>
    //    <a href="jav&#x0A;ascript:alert('XSS');">IE67chrome</a>
    sanitize: function(str) {
      return str.replace(rscripts, "").replace(ropen, function(a, b) {
        var match = a.toLowerCase().match(/<(\w+)\s/)
        if (match) { //处理a标签的href属性，img标签的src属性，form标签的action属性
          var reg = rsanitize[match[1]]
          if (reg) {
            a = a.replace(reg, function(s, name, value) {
              var quote = value.charAt(0)
              return name + "=" + quote + "javascript:void(0)" + quote// jshint ignore:line
            })
          }
        }
        return a.replace(ron, " ").replace(/\s+/g, " ") //移除onXXX事件
      })
    },
    escape: function(str) {
      //将字符串经过 str 转义得到适合在页面中显示的内容, 例如替换 < 为 &lt 
      return String(str).
          replace(/&/g, '&amp;').
          replace(rsurrogate, function(value) {
            var hi = value.charCodeAt(0)
            var low = value.charCodeAt(1)
            return '&#' + (((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000) + ';'
          }).
          replace(rnoalphanumeric, function(value) {
            return '&#' + value.charCodeAt(0) + ';'
          }).
          replace(/</g, '&lt;').
          replace(/>/g, '&gt;')
    },
    currency: function(amount, symbol, fractionSize) {
      return (symbol || "\uFFE5") + numberFormat(amount, isFinite(fractionSize) ? fractionSize : 2)
    },
    number: numberFormat
  }
  /*
   'yyyy': 4 digit representation of year (e.g. AD 1 => 0001, AD 2010 => 2010)
   'yy': 2 digit representation of year, padded (00-99). (e.g. AD 2001 => 01, AD 2010 => 10)
   'y': 1 digit representation of year, e.g. (AD 1 => 1, AD 199 => 199)
   'MMMM': Month in year (January-December)
   'MMM': Month in year (Jan-Dec)
   'MM': Month in year, padded (01-12)
   'M': Month in year (1-12)
   'dd': Day in month, padded (01-31)
   'd': Day in month (1-31)
   'EEEE': Day in Week,(Sunday-Saturday)
   'EEE': Day in Week, (Sun-Sat)
   'HH': Hour in day, padded (00-23)
   'H': Hour in day (0-23)
   'hh': Hour in am/pm, padded (01-12)
   'h': Hour in am/pm, (1-12)
   'mm': Minute in hour, padded (00-59)
   'm': Minute in hour (0-59)
   'ss': Second in minute, padded (00-59)
   's': Second in minute (0-59)
   'a': am/pm marker
   'Z': 4 digit (+sign) representation of the timezone offset (-1200-+1200)
   format string can also be one of the following predefined localizable formats:

   'medium': equivalent to 'MMM d, y h:mm:ss a' for en_US locale (e.g. Sep 3, 2010 12:05:08 pm)
   'short': equivalent to 'M/d/yy h:mm a' for en_US locale (e.g. 9/3/10 12:05 pm)
   'fullDate': equivalent to 'EEEE, MMMM d,y' for en_US locale (e.g. Friday, September 3, 2010)
   'longDate': equivalent to 'MMMM d, y' for en_US locale (e.g. September 3, 2010
   'mediumDate': equivalent to 'MMM d, y' for en_US locale (e.g. Sep 3, 2010)
   'shortDate': equivalent to 'M/d/yy' for en_US locale (e.g. 9/3/10)
   'mediumTime': equivalent to 'h:mm:ss a' for en_US locale (e.g. 12:05:08 pm)
   'shortTime': equivalent to 'h:mm a' for en_US locale (e.g. 12:05 pm)
   */
  new function() {// jshint ignore:line
    function toInt(str) {
      return parseInt(str, 10) || 0
    }

    function padNumber(num, digits, trim) {
      var neg = ""
      if (num < 0) {
        neg = '-'
        num = -num
      }
      num = "" + num
      while (num.length < digits)
        num = "0" + num
      if (trim)
        num = num.substr(num.length - digits)
      return neg + num
    }

    function dateGetter(name, size, offset, trim) {
      return function(date) {
        var value = date["get" + name]()
        if (offset > 0 || value > -offset)
          value += offset
        if (value === 0 && offset === -12) {
          value = 12
        }
        return padNumber(value, size, trim)
      }
    }

    function dateStrGetter(name, shortForm) {
      return function(date, formats) {
        var value = date["get" + name]()
        var get = (shortForm ? ("SHORT" + name) : name).toUpperCase()
        return formats[get][value]
      }
    }

    function timeZoneGetter(date) {
      var zone = -1 * date.getTimezoneOffset()
      var paddedZone = (zone >= 0) ? "+" : ""
      paddedZone += padNumber(Math[zone > 0 ? "floor" : "ceil"](zone / 60), 2) + padNumber(Math.abs(zone % 60), 2)
      return paddedZone
    }
    //取得上午下午

    function ampmGetter(date, formats) {
      return date.getHours() < 12 ? formats.AMPMS[0] : formats.AMPMS[1]
    }
    var DATE_FORMATS = {
      yyyy: dateGetter("FullYear", 4),
      yy: dateGetter("FullYear", 2, 0, true),
      y: dateGetter("FullYear", 1),
      MMMM: dateStrGetter("Month"),
      MMM: dateStrGetter("Month", true),
      MM: dateGetter("Month", 2, 1),
      M: dateGetter("Month", 1, 1),
      dd: dateGetter("Date", 2),
      d: dateGetter("Date", 1),
      HH: dateGetter("Hours", 2),
      H: dateGetter("Hours", 1),
      hh: dateGetter("Hours", 2, -12),
      h: dateGetter("Hours", 1, -12),
      mm: dateGetter("Minutes", 2),
      m: dateGetter("Minutes", 1),
      ss: dateGetter("Seconds", 2),
      s: dateGetter("Seconds", 1),
      sss: dateGetter("Milliseconds", 3),
      EEEE: dateStrGetter("Day"),
      EEE: dateStrGetter("Day", true),
      a: ampmGetter,
      Z: timeZoneGetter
    }
    var rdateFormat = /((?:[^yMdHhmsaZE']+)|(?:'(?:[^']|'')*')|(?:E+|y+|M+|d+|H+|h+|m+|s+|a|Z))(.*)/
    var raspnetjson = /^\/Date\((\d+)\)\/$/
    filters.date = function(date, format) {
      var locate = filters.date.locate,
          text = "",
          parts = [],
          fn, match
      format = format || "mediumDate"
      format = locate[format] || format
      if (typeof date === "string") {
        if (/^\d+$/.test(date)) {
          date = toInt(date)
        } else if (raspnetjson.test(date)) {
          date = +RegExp.$1
        } else {
          var trimDate = date.trim()
          var dateArray = [0, 0, 0, 0, 0, 0, 0]
          var oDate = new Date(0)
          //取得年月日
          trimDate = trimDate.replace(/^(\d+)\D(\d+)\D(\d+)/, function(_, a, b, c) {
            var array = c.length === 4 ? [c, a, b] : [a, b, c]
            dateArray[0] = toInt(array[0])     //年
            dateArray[1] = toInt(array[1]) - 1 //月
            dateArray[2] = toInt(array[2])     //日
            return ""
          })
          var dateSetter = oDate.setFullYear
          var timeSetter = oDate.setHours
          trimDate = trimDate.replace(/[T\s](\d+):(\d+):?(\d+)?\.?(\d)?/, function(_, a, b, c, d) {
            dateArray[3] = toInt(a) //小时
            dateArray[4] = toInt(b) //分钟
            dateArray[5] = toInt(c) //秒
            if (d) {                //毫秒
              dateArray[6] = Math.round(parseFloat("0." + d) * 1000)
            }
            return ""
          })
          var tzHour = 0
          var tzMin = 0
          trimDate = trimDate.replace(/Z|([+-])(\d\d):?(\d\d)/, function(z, symbol, c, d) {
            dateSetter = oDate.setUTCFullYear
            timeSetter = oDate.setUTCHours
            if (symbol) {
              tzHour = toInt(symbol + c)
              tzMin = toInt(symbol + d)
            }
            return ""
          })

          dateArray[3] -= tzHour
          dateArray[4] -= tzMin
          dateSetter.apply(oDate, dateArray.slice(0, 3))
          timeSetter.apply(oDate, dateArray.slice(3))
          date = oDate
        }
      }
      if (typeof date === "number") {
        date = new Date(date)
      }
      if (avalon.type(date) !== "date") {
        return
      }
      while (format) {
        match = rdateFormat.exec(format)
        if (match) {
          parts = parts.concat(match.slice(1))
          format = parts.pop()
        } else {
          parts.push(format)
          format = null
        }
      }
      parts.forEach(function(value) {
        fn = DATE_FORMATS[value]
        text += fn ? fn(date, locate) : value.replace(/(^'|'$)/g, "").replace(/''/g, "'")
      })
      return text
    }
    var locate = {
      AMPMS: {
        0: "上午",
        1: "下午"
      },
      DAY: {
        0: "星期日",
        1: "星期一",
        2: "星期二",
        3: "星期三",
        4: "星期四",
        5: "星期五",
        6: "星期六"
      },
      MONTH: {
        0: "1月",
        1: "2月",
        2: "3月",
        3: "4月",
        4: "5月",
        5: "6月",
        6: "7月",
        7: "8月",
        8: "9月",
        9: "10月",
        10: "11月",
        11: "12月"
      },
      SHORTDAY: {
        "0": "周日",
        "1": "周一",
        "2": "周二",
        "3": "周三",
        "4": "周四",
        "5": "周五",
        "6": "周六"
      },
      fullDate: "y年M月d日EEEE",
      longDate: "y年M月d日",
      medium: "yyyy-M-d H:mm:ss",
      mediumDate: "yyyy-M-d",
      mediumTime: "H:mm:ss",
      "short": "yy-M-d ah:mm",
      shortDate: "yy-M-d",
      shortTime: "ah:mm"
    }
    locate.SHORTMONTH = locate.MONTH
    filters.date.locate = locate
  }// jshint ignore:line
  /*********************************************************************
   *                      AMD加载器                                   *
   **********************************************************************/
//https://www.devbridge.com/articles/understanding-amd-requirejs/
//http://maxogden.com/nested-dependencies.html
  var modules = avalon.modules = {
    "domReady!": {
      exports: avalon,
      state: 3
    },
    "avalon": {
      exports: avalon,
      state: 4
    }
  }
//Object(modules[id]).state拥有如下值 
// undefined  没有定义
// 1(send)    已经发出请求
// 2(loading) 已经被执行但还没有执行完成，在这个阶段define方法会被执行
// 3(loaded)  执行完毕，通过onload/onreadystatechange回调判定，在这个阶段checkDeps方法会执行
// 4(execute)  其依赖也执行完毕, 值放到exports对象上，在这个阶段fireFactory方法会执行
  modules.exports = modules.avalon

  new function () {// jshint ignore:line
    var loadings = [] //正在加载中的模块列表
    var factorys = [] //放置define方法的factory函数
    var rjsext = /\.js$/i
    function makeRequest(name, config) {
//1. 去掉资源前缀
      var res = "js"
      name = name.replace(/^(\w+)\!/, function (a, b) {
        res = b
        return ""
      })
      if (res === "ready") {
        log("debug: ready!已经被废弃，请使用domReady!")
        res = "domReady"
      }
//2. 去掉querystring, hash
      var query = ""
      name = name.replace(rquery, function (a) {
        query = a
        return ""
      })
      //3. 去掉扩展名
      var suffix = "." + res
      var ext = /js|css/.test(suffix) ? suffix : ""
      name = name.replace(/\.[a-z0-9]+$/g, function (a) {
        if (a === suffix) {
          ext = a
          return ""
        } else {
          return a
        }
      })
      var req = avalon.mix({
        query: query,
        ext: ext,
        res: res,
        name: name,
        toUrl: toUrl
      }, config)
      req.toUrl(name)
      return req
    }

    function fireRequest(req) {
      var name = req.name
      var res = req.res
      //1. 如果该模块已经发出请求，直接返回
      var module = modules[name]
      var urlNoQuery = name && req.urlNoQuery
      if (module && module.state >= 1) {
        return name
      }
      module = modules[urlNoQuery]
      if (module && module.state >= 3) {
        innerRequire(module.deps || [], module.factory, urlNoQuery)
        return urlNoQuery
      }
      if (name && !module) {
        module = modules[urlNoQuery] = {
          id: urlNoQuery,
          state: 1 //send
        }
        var wrap = function (obj) {
          resources[res] = obj
          obj.load(name, req, function (a) {
            if (arguments.length && a !== void 0) {
              module.exports = a
            }
            module.state = 4
            checkDeps()
          })
        }

        if (!resources[res]) {
          innerRequire([res], wrap)
        } else {
          wrap(resources[res])
        }
      }
      return name ? urlNoQuery : res + "!"
    }

//核心API之一 require
    var requireQueue = []
    var isUserFirstRequire = false
    innerRequire = avalon.require = function (array, factory, parentUrl, defineConfig) {
      if (!isUserFirstRequire) {
        requireQueue.push(avalon.slice(arguments))
        if (arguments.length <= 2) {
          isUserFirstRequire = true
          var queue = requireQueue.splice(0, requireQueue.length), args
          while (args = queue.shift()) {
            innerRequire.apply(null, args)
          }
        }
        return
      }

      if (!Array.isArray(array)) {
        avalon.error("require方法的第一个参数应为数组 " + array)
      }
      var deps = [] // 放置所有依赖项的完整路径
      var uniq = {}
      var id = parentUrl || "callback" + setTimeout("1")// jshint ignore:line
      defineConfig = defineConfig || {}
      defineConfig.baseUrl = kernel.baseUrl
      var isBuilt = !!defineConfig.built
      if (parentUrl) {
        defineConfig.parentUrl = parentUrl.substr(0, parentUrl.lastIndexOf("/"))
        defineConfig.mapUrl = parentUrl.replace(rjsext, "")
      }
      if (isBuilt) {
        var req = makeRequest(defineConfig.defineName, defineConfig)
        id = req.urlNoQuery
      } else {
        array.forEach(function (name) {
          var req = makeRequest(name, defineConfig)
          var url = fireRequest(req) //加载资源，并返回该资源的完整地址
          if (url) {
            if (!uniq[url]) {
              deps.push(url)
              uniq[url] = "司徒正美" //去重
            }
          }
        })
      }

      var module = modules[id]
      if (!module || module.state !== 4) {
        modules[id] = {
          id: id,
          deps: isBuilt ? array.concat() : deps,
          factory: factory || noop,
          state: 3
        }
      }
      if (!module) {
        //如果此模块是定义在另一个JS文件中, 那必须等该文件加载完毕, 才能放到检测列队中
        loadings.push(id)
      }
      checkDeps()
    }

//核心API之二 require
    innerRequire.define = function (name, deps, factory) { //模块名,依赖列表,模块本身
      if (typeof name !== "string") {
        factory = deps
        deps = name
        name = "anonymous"
      }
      if (!Array.isArray(deps)) {
        factory = deps
        deps = []
      }
      var config = {
        built: !isUserFirstRequire, //用r.js打包后,所有define会放到requirejs之前
        defineName: name
      }
      var args = [deps, factory, config]
      factory.require = function (url) {
        args.splice(2, 0, url)
        if (modules[url]) {
          modules[url].state = 3 //loaded
          var isCycle = false
          try {
            isCycle = checkCycle(modules[url].deps, url)
          } catch (e) {
          }
          if (isCycle) {
            avalon.error(url + "模块与之前的模块存在循环依赖，请不要直接用script标签引入" + url + "模块")
          }
        }
        delete factory.require //释放内存
        innerRequire.apply(null, args) //0,1,2 --> 1,2,0
      }
//根据标准,所有遵循W3C标准的浏览器,script标签会按标签的出现顺序执行。
//老的浏览器中，加载也是按顺序的：一个文件下载完成后，才开始下载下一个文件。
//较新的浏览器中（IE8+ 、FireFox3.5+ 、Chrome4+ 、Safari4+），为了减小请求时间以优化体验，
//下载可以是并行的，但是执行顺序还是按照标签出现的顺序。
//但如果script标签是动态插入的, 就未必按照先请求先执行的原则了,目测只有firefox遵守
//唯一比较一致的是,IE10+及其他标准浏览器,一旦开始解析脚本, 就会一直堵在那里,直接脚本解析完毕
//亦即，先进入loading阶段的script标签(模块)必然会先进入loaded阶段
      var url = config.built ? "unknown" : getCurrentScript()
      if (url) {
        var module = modules[url]
        if (module) {
          module.state = 2
        }
        factory.require(url)
      } else {//合并前后的safari，合并后的IE6-9走此分支
        factorys.push(factory)
      }
    }
//核心API之三 require.config(settings)
    innerRequire.config = kernel
    //核心API之四 define.amd 标识其符合AMD规范
    innerRequire.define.amd = modules

    //==========================对用户配置项进行再加工==========================
    var allpaths = kernel["orig.paths"] = {}
    var allmaps = kernel["orig.map"] = {}
    var allpackages = kernel["packages"] = []
    var allargs = kernel["orig.args"] = {}
    avalon.mix(plugins, {
      paths: function (hash) {
        avalon.mix(allpaths, hash)
        kernel.paths = makeIndexArray(allpaths)
      },
      map: function (hash) {
        avalon.mix(allmaps, hash)
        var list = makeIndexArray(allmaps, 1, 1)
        avalon.each(list, function (_, item) {
          item.val = makeIndexArray(item.val)
        })
        kernel.map = list
      },
      packages: function (array) {
        array = array.concat(allpackages)
        var uniq = {}
        var ret = []
        for (var i = 0, pkg; pkg = array[i++]; ) {
          pkg = typeof pkg === "string" ? {name: pkg} : pkg
          var name = pkg.name
          if (!uniq[name]) {
            var url = joinPath(pkg.location || name, pkg.main || "main")
            url = url.replace(rjsext, "")
            ret.push(pkg)
            uniq[name] = pkg.location = url
            pkg.reg = makeMatcher(name)
          }
        }
        kernel.packages = ret.sort()
      },
      urlArgs: function (hash) {
        if (typeof hash === "string") {
          hash = {"*": hash}
        }
        avalon.mix(allargs, hash)
        kernel.urlArgs = makeIndexArray(allargs, 1)
      },
      baseUrl: function (url) {
        if (!isAbsUrl(url)) {
          var baseElement = head.getElementsByTagName("base")[0]
          if (baseElement) {
            head.removeChild(baseElement)
          }
          var node = DOC.createElement("a")
          node.href = url
          url = getFullUrl(node, "href")
          if (baseElement) {
            head.insertBefore(baseElement, head.firstChild)
          }
        }
        if (url.length > 3)
          kernel.baseUrl = url
      },
      shim: function (obj) {
        for (var i in obj) {
          var value = obj[i]
          if (Array.isArray(value)) {
            value = obj[i] = {
              deps: value
            }
          }
          if (!value.exportsFn && (value.exports || value.init)) {
            value.exportsFn = makeExports(value)
          }
        }
        kernel.shim = obj
      }

    })


    //==============================内部方法=================================
    function checkCycle(deps, nick) {
      //检测是否存在循环依赖
      for (var i = 0, id; id = deps[i++]; ) {
        if (modules[id].state !== 4 &&
            (id === nick || checkCycle(modules[id].deps, nick))) {
          return true
        }
      }
    }

    function checkFail(node, onError, fuckIE) {
      var id = trimQuery(node.src) //检测是否死链
      node.onload = node.onreadystatechange = node.onerror = null
      if (onError || (fuckIE && modules[id] && !modules[id].state)) {
        setTimeout(function () {
          head.removeChild(node)
          node = null // 处理旧式IE下的循环引用问题
        })
        log("debug: 加载 " + id + " 失败" + onError + " " + (!modules[id].state))
      } else {
        return true
      }
    }

    function checkDeps() {
      //检测此JS模块的依赖是否都已安装完毕,是则安装自身
      loop: for (var i = loadings.length, id; id = loadings[--i]; ) {
        var obj = modules[id],
            deps = obj.deps
        if (!deps)
          continue
        for (var j = 0, key; key = deps[j]; j++) {
          if (Object(modules[key]).state !== 4) {
            continue loop
          }
        }
        //如果deps是空对象或者其依赖的模块的状态都是2
        if (obj.state !== 4) {
          loadings.splice(i, 1) //必须先移除再安装，防止在IE下DOM树建完后手动刷新页面，会多次执行它
          fireFactory(obj.id, obj.deps, obj.factory)
          checkDeps() //如果成功,则再执行一次,以防有些模块就差本模块没有安装好
        }
      }
    }

    var rreadyState = /complete|loaded/
    function loadJS(url, id, callback) {
      //通过script节点加载目标模块
      var node = DOC.createElement("script")
      node.className = subscribers //让getCurrentScript只处理类名为subscribers的script节点
      var supportLoad = "onload" in node
      var onEvent = supportLoad ? "onload" : "onreadystatechange"
      function onload() {
        var factory = factorys.pop()
        factory && factory.require(id)
        if (callback) {
          callback()
        }
        if (checkFail(node, false, !supportLoad)) {
          log("debug: 已成功加载 " + url)
          id && loadings.push(id)
          checkDeps()
        }
      }
      var index = 0, loadID
      node[onEvent] = supportLoad ? onload : function () {
        if (rreadyState.test(node.readyState)) {
          ++index
          if (index === 1) {
            loadID = setTimeout(onload, 500)
          } else {
            clearTimeout(loadID)
            onload()
          }
        }
      }
      node.onerror = function () {
        checkFail(node, true)
      }

      head.insertBefore(node, head.firstChild) //chrome下第二个参数不能为null
      node.src = url //插入到head的第一个节点前，防止IE6下head标签没闭合前使用appendChild抛错
      log("debug: 正准备加载 " + url) //更重要的是IE6下可以收窄getCurrentScript的寻找范围
    }

    var resources = innerRequire.plugins = {
      //三大常用资源插件 js!, css!, text!, ready!
      ready: {
        load: noop
      },
      js: {
        load: function (name, req, onLoad) {
          var url = req.url
          var id = req.urlNoQuery
          var shim = kernel.shim[name.replace(rjsext, "")]
          if (shim) { //shim机制
            innerRequire(shim.deps || [], function () {
              var args = avalon.slice(arguments)
              loadJS(url, id, function () {
                onLoad(shim.exportsFn ? shim.exportsFn.apply(0, args) : void 0)
              })
            })
          } else {
            loadJS(url, id)
          }
        }
      },
      css: {
        load: function (name, req, onLoad) {
          var url = req.url
          var node = DOC.createElement("link")
          node.rel = "stylesheet"
          node.href = url
          head.insertBefore(node, head.firstChild)
          log("debug: 已成功加载 " + url)
          onLoad()
        }
      },
      text: {
        load: function (name, req, onLoad) {
          var url = req.url
          var xhr = getXHR()
          xhr.onreadystatechange = function () {
            if (xhr.readyState === 4) {
              var status = xhr.status;
              if (status > 399 && status < 600) {
                avalon.error(url + " 对应资源不存在或没有开启 CORS")
              } else {
                log("debug: 已成功加载 " + url)
                onLoad(xhr.responseText)
              }
            }
          }
          var time = "_=" + (new Date() - 0)
          var _url = url.indexOf("?") === -1 ? url + "?" + time : url + "&" + time
          xhr.open("GET", _url, true)
          if ("withCredentials" in xhr) {//这是处理跨域
            xhr.withCredentials = true
          }
          xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest")//告诉后端这是AJAX请求
          xhr.send()
          log("debug: 正准备加载 " + url)
        }
      }
    }
    innerRequire.checkDeps = checkDeps

    var rquery = /(\?[^#]*)$/
    function trimQuery(url) {
      return (url || "").replace(rquery, "")
    }

    function isAbsUrl(path) {
      //http://stackoverflow.com/questions/10687099/how-to-test-if-a-url-string-is-absolute-or-relative
      return  /^(?:[a-z]+:)?\/\//i.test(String(path))
    }

    function getFullUrl(node, src) {
      return"1"[0] ? node[src] : node.getAttribute(src, 4)
    }

    function getCurrentScript() {
      // inspireb by https://github.com/samyk/jiagra/blob/master/jiagra.js
      var stack
      try {
        a.b.c() //强制报错,以便捕获e.stack
      } catch (e) { //safari5的sourceURL，firefox的fileName，它们的效果与e.stack不一样
        stack = e.stack
        if (!stack && window.opera) {
          //opera 9没有e.stack,但有e.Backtrace,但不能直接取得,需要对e对象转字符串进行抽取
          stack = (String(e).match(/of linked script \S+/g) || []).join(" ")
        }
      }
      if (stack) {
        /**e.stack最后一行在所有支持的浏览器大致如下:
         *chrome23:
         * at http://113.93.50.63/data.js:4:1
         *firefox17:
         *@http://113.93.50.63/query.js:4
         *opera12:http://www.oldapps.com/opera.php?system=Windows_XP
         *@http://113.93.50.63/data.js:4
         *IE10:
         *  at Global code (http://113.93.50.63/data.js:4:1)
         *  //firefox4+ 可以用document.currentScript
         */
        stack = stack.split(/[@ ]/g).pop() //取得最后一行,最后一个空格或@之后的部分
        stack = stack[0] === "(" ? stack.slice(1, -1) : stack.replace(/\s/, "") //去掉换行符
        return trimQuery(stack.replace(/(:\d+)?:\d+$/i, "")) //去掉行号与或许存在的出错字符起始位置
      }
      var nodes = head.getElementsByTagName("script") //只在head标签中寻找
      for (var i = nodes.length, node; node = nodes[--i]; ) {
        if (node.className === subscribers && node.readyState === "interactive") {
          var url = getFullUrl(node, "src")
          return node.className = trimQuery(url)
        }
      }
    }

    var rcallback = /^callback\d+$/
    function fireFactory(id, deps, factory) {
      var module = Object(modules[id])
      module.state = 4
      for (var i = 0, array = [], d; d = deps[i++]; ) {
        if (d === "exports") {
          var obj = module.exports || (module.exports = {})
          array.push(obj)
        } else {
          array.push(modules[d].exports)
        }
      }
      try {
        var ret = factory.apply(window, array)
      } catch (e) {
        log("执行[" + id + "]模块的factory抛错： ", e)
      }
      if (ret !== void 0) {
        module.exports = ret
      }
      if (rcallback.test(id)) {
        delete modules[id]
      }
      delete module.factory
      return ret
    }
    function toUrl(id) {
      if (id.indexOf(this.res + "!") === 0) {
        id = id.slice(this.res.length + 1) //处理define("css!style",[], function(){})的情况
      }
      var url = id
      //1. 是否命中paths配置项
      var usePath = 0
      var baseUrl = this.baseUrl
      var rootUrl = this.parentUrl || baseUrl
      eachIndexArray(id, kernel.paths, function (value, key) {
        url = url.replace(key, value)
        usePath = 1
      })
      //2. 是否命中packages配置项
      if (!usePath) {
        eachIndexArray(id, kernel.packages, function (value, key, item) {
          url = url.replace(item.name, item.location)
        })
      }
      //3. 是否命中map配置项
      if (this.mapUrl) {
        eachIndexArray(this.mapUrl, kernel.map, function (array) {
          eachIndexArray(url, array, function (mdValue, mdKey) {
            url = url.replace(mdKey, mdValue)
            rootUrl = baseUrl
          })
        })
      }
      var ext = this.ext
      if (ext && usePath && url.slice(-ext.length) === ext) {
        url = url.slice(0, -ext.length)
      }
      //4. 转换为绝对路径
      if (!isAbsUrl(url)) {
        rootUrl = this.built || /^\w/.test(url) ? baseUrl : rootUrl
        url = joinPath(rootUrl, url)
      }
      //5. 还原扩展名，query
      var urlNoQuery = url + ext
      url = urlNoQuery + this.query
      urlNoQuery = url.replace(rquery, function (a) {
        this.query = a
        return ""
      })
      //6. 处理urlArgs
      eachIndexArray(id, kernel.urlArgs, function (value) {
        url += (url.indexOf("?") === -1 ? "?" : "&") + value;
      })
      this.url = url
      return  this.urlNoQuery = urlNoQuery
    }

    function makeIndexArray(hash, useStar, part) {
      //创建一个经过特殊算法排好序的数组
      var index = hash2array(hash, useStar, part)
      index.sort(descSorterByName)
      return index
    }

    function makeMatcher(prefix) {
      return new RegExp('^' + prefix + '(/|$)')
    }

    function makeExports(value) {
      return function () {
        var ret
        if (value.init) {
          ret = value.init.apply(window, arguments)
        }
        return ret || (value.exports && getGlobal(value.exports))
      }
    }


    function hash2array(hash, useStar, part) {
      var array = [];
      for (var key in hash) {
        if (ohasOwn.call(hash, key)) {
          var item = {
            name: key,
            val: hash[key]
          }
          array.push(item)
          item.reg = key === "*" && useStar ? /^/ : makeMatcher(key)
          if (part && key !== "*") {
            item.reg = new RegExp('\/' + key.replace(/^\//, "") + '(/|$)')
          }
        }
      }
      return array
    }

    function eachIndexArray(moduleID, array, matcher) {
      array = array || []
      for (var i = 0, el; el = array[i++]; ) {
        if (el.reg.test(moduleID)) {
          matcher(el.val, el.name, el)
          return false
        }
      }
    }
    // 根据元素的name项进行数组字符数逆序的排序函数
    function descSorterByName(a, b) {
      var aaa = a.name
      var bbb = b.name
      if (bbb === "*") {
        return -1
      }
      if (aaa === "*") {
        return 1
      }
      return bbb.length - aaa.length
    }

    var rdeuce = /\/\w+\/\.\./
    function joinPath(a, b) {
      if (a.charAt(a.length - 1) !== "/") {
        a += "/"
      }
      if (b.slice(0, 2) === "./") { //相对于兄弟路径
        return a + b.slice(2)
      }
      if (b.slice(0, 2) === "..") { //相对于父路径
        a += b
        while (rdeuce.test(a)) {
          a = a.replace(rdeuce, "")
        }
        return a
      }
      if (b.slice(0, 1) === "/") {
        return a + b.slice(1)
      }
      return a + b
    }

    function getGlobal(value) {
      if (!value) {
        return value
      }
      var g = window
      value.split(".").forEach(function (part) {
        g = g[part]
      })
      return g
    }

    var mainNode = DOC.scripts[DOC.scripts.length - 1]
    var dataMain = mainNode.getAttribute("data-main")
    if (dataMain) {
      plugins.baseUrl(dataMain)
      var href = kernel.baseUrl
      kernel.baseUrl = href.slice(0, href.lastIndexOf("/") + 1)
      loadJS(href.replace(rjsext, "") + ".js")
    } else {
      var loaderUrl = trimQuery(getFullUrl(mainNode, "src"))
      kernel.baseUrl = loaderUrl.slice(0, loaderUrl.lastIndexOf("/") + 1)
    }
  }// jshint ignore:line

  /*********************************************************************
   *                           DOMReady                               *
   **********************************************************************/

  var readyList = [], isReady
  var fireReady = function(fn) {
    isReady = true
    if (innerRequire) {
      modules["domReady!"].state = 4
      innerRequire.checkDeps()
    }
    while(fn = readyList.shift()){
      fn(avalon)
    }
  }

  function doScrollCheck() {
    try { //IE下通过doScrollCheck检测DOM树是否建完
      root.doScroll("left")
      fireReady()
    } catch (e) {
      setTimeout(doScrollCheck)
    }
  }

  if (DOC.readyState === "complete") {
    setTimeout(fireReady) //如果在domReady之外加载
  } else if (W3C) {
    DOC.addEventListener("DOMContentLoaded", fireReady)
  } else {
    DOC.attachEvent("onreadystatechange", function() {
      if (DOC.readyState === "complete") {
        fireReady()
      }
    })
    try {
      var isTop = window.frameElement === null
    } catch (e) {
    }
    if (root.doScroll && isTop && window.external) {//fix IE iframe BUG
      doScrollCheck()
    }
  }
  avalon.bind(window, "load", fireReady)

  avalon.ready = function(fn) {
    if (!isReady) {
      readyList.push(fn)
    } else {
      fn(avalon)
    }
  }

  avalon.config({
    loader: true
  })

  avalon.ready(function() {
    avalon.scan(DOC.body)
  })

// Register as a named AMD module, since avalon can be concatenated with other
// files that may use define, but not via a proper concatenation script that
// understands anonymous AMD modules. A named AMD is safest and most robust
// way to register. Lowercase avalon is used because AMD module names are
// derived from file names, and Avalon is normally delivered in a lowercase
// file name. Do this after creating the global so that if an AMD module wants
// to call noConflict to hide this version of avalon, it will work.

// Note that for maximum portability, libraries that are not avalon should
// declare themselves as anonymous modules, and avoid setting a global if an
// AMD loader is present. avalon is a special case. For more information, see
// https://github.com/jrburke/requirejs/wiki/Updating-existing-libraries#wiki-anon
  if (typeof define === "function" && define.amd) {
    define("avalon", [], function() {
      return avalon
    })
  }
// Map over avalon in case of overwrite
  var _avalon = window.avalon
  avalon.noConflict = function(deep) {
    if (deep && window.avalon === avalon) {
      window.avalon = _avalon
    }
    return avalon
  }
// Expose avalon identifiers, even in AMD
// and CommonJS for browser emulators
  if (noGlobal === void 0) {
    window.avalon = avalon
  }

  return avalon

}));